QUOTE (Nath @ Dec 23 2013, 01:13 AM)

Note that in the previous editions, "VR" simply meant "Virtual Reality," which did imply "Realistic Virtuality," let alone in real time. It wasn't anything near simsense level. Icons and background were always obviously computer-generated. Only the few so-called "Ultraviolet" hosts were achieving reality-like level inside the Matrix. Otherwise, Simsense was only available on cable network at home and chips in the streets. The 4th edition did not differ a lot:
Fair enough, but I think it's obvious to most readers that I'm talking about full immersion, regardless of appearance (and allowing for terminological confusion), which also applies to wireless rigging, as opposed to remote control. What I'm trying to point out is that anyone using wireless for hacking should not get a sim bonus (hot or cold) since the sheer level of data transfer would offer no substantial advantage over a well tuned regular interface, and that riggers trying to genuinely feel the thrum of the fuel pump should absolutely be plugged in to their vehicles.
QUOTE (Nath @ Dec 23 2013, 01:13 AM)

Also, most people forget that 3rd edition Matrix book was the first to make cellphone or satlink an option for Matrix access, which put a restriction on up/download speed, thus only affecting file transfer but not the VR experience itself (including the occasional UV host). Simsense file happened to be small enough to still be downloaded easily.
This is where it breaks down into nonsense again, if the download is wireless. Bear in mind that we are talking a level of neural override and sensory detail which will let Bog the Trog spend half an hour experiencing what it is like to be Getlaidriel the elven porn starlet while she's being gangbanged by a bunch of dwarves, down to the specifics of Thorin Oakenrod grabbing her delicately pointed elven ears and the smell of his groin, while Gimlet son of Growin's corona rubs against her cervix. Half an hour at our reduced assumption of 4Tbps is 7,2 petabits, or roughly one petabyte allowing for a little bit in protocol and error correction overheads. Even assuming you have magical wireless and nobody near you is exploiting the same base stations much, to the point that you get 1Tbps (hah!) while wandering through a Seattle Arcology, you're looking at a couple of hours. Bear in mind this is where you'd be surrounded by wireless access points on a level beyond pretty much anything except a testbed lab, and bathed in radiation like an experimental test subject, and somehow mysteriously nobody else is around to compete for the same bandwidth, and you are doing nothing else with the available bandwidth either. Unless your definition of `small enough' after laughably huge levels of compression, ludicrous assumptions about electromagnetic radiation, and a treatment of information theory in signalling which is flat-out insane under fantasy-level ideal circumstances is most of a day to download the equivalent of a 90-minute movie, it just ain't so.
If we reduce the aggression of our assumptions in favour of that theory to, say, 100Tb per displayed second of data (much more plausible), 100Gbps under still marvellous but more plausible conditions, we're looking at 1500 hours of downloading a 90-minute movie, or roughly three months. Basically, simsense transmitted wirelessly is not really plausible.
So, to bring this back to the point at hand:
Wireless rigging? Implausible, as a full sim exercise.
Wireless hacking? Sure, just no reason to believe that hot or cold sim would offer any advantage which a set of goggles and twitch game grade controls wouldn't offer. In other words, non-sim VR should work basically as well.
Wired hacking? Now the arguments in favour of sim make a (tiny) bit more sense.
Now, before you wave the flag of Shadowrun-ain't-real-so-magical-technological-leaps-are-all-fine, let me point out that real live brokerage houses today are running into speed-of-light problems in arranging their global networks, and that is not a joke. We're also pushing hard against the kind of wireless bandwidth which can even theoretically be offered by a given wavelength. Alternatively, if you want to argue that the brain doesn't run at 1000Hz even if particular neurons do so the data throughput should be smaller, then great, but where is the huge edge which simsense is supposed to offer? Response time? No, because hacking is actually a decision-making and analytical exercise more than a twitch game. Throughput? No, because sim is more demanding than VR in networking terms. Intuitive data presentations? If they're largely visual the difference between stimulating the cortex directly versus the retina is at best counted in milliseconds (bear in mind that some predigestion of visual data occurs in and around the retina) - and the stimulus is a tiny part of the whole where the brain actually has to digest, interpret and react to the stimulus. Unless your responses are strictly rote or drilled reactions, you need to think about them. Look at kids writing examinations in anything requiring analytical thought. They aren't just scribbling as fast as their pens can move - they're pausing to think, count, examine the data. Sometimes increased writing speed might help - but just as often it would be a meaningless bonus. The typical time saved over a three hour examination would at best be maybe five minutes.
The good news is that all this offers an up-front, clearly explicable set of reasons why wired hacking is better than wireless, especially if you can get your wired connection in a vulnerable part of the target network. Should it require a huge deck? I don't care. I see no inherent reason a cyberdeck should be larger than a laptop.
The bad news is that it makes it very clear that SR4 style wireless matrix hacking introduced a whole new layer of technological bulldrek into the milieu because it apparently dawned on someone somewhere that smartphones were getting popular.