Okay, for once I'm skipping most of the thread before saying anything, I just wanted to reply to the initial point early on about Stantum screens specifically:

The way stantum screens are able to pin-point a touch location with more precision than they have sensors for is simple math (well, calculus, if you understand where the basic math transits over into calculus, but whatever) - you detect "this cell is reporting contacts on [set of points], with (amount) of pressure; this cell is reporting contacts on [other set of points] with (other amount) of pressure". And so on for every "cell". Even with only four different cells (assuming they're arranged as squares) you can calculate where in between those cells the touch is.

And I'm not 100% sure the response javispedro gave me is accurate, but it makes sense. The layman's explanation on the Stantum site shows that the two 'layers' of the screen have a bunch of tiny transparent 'separator' dots. Logically, I can understand how this can compare to having a 'bunch' of mini-screens. I can see how this prevents the normal all-touches-register-as-one-big-touch problem. Imagine a giant cellophane layer stretched over a rectangle. If you press it down, it bulges in. If you press it down in two places, simple physics makes it the two inward bulges blend together into one elongated bulge (though this also suggests that with proper mathmatic calculations, you may be able to distinguish single 'point/circle touch' from 'blob/odd-shape touch', if those calculations don't force too much resource use constantly.

Anyway, if you stick a bar along the middle of the empty space over which the cellophane is stretched, the bulge from a press across one 'section' can't reach across the other. So you can now detect two touches so long as they are in separate sections, AND, if you press down both sections at once with something really really big, you can calculate the center of the really big touch by using the positions/pressure of touches detected in both sections.

Now expand the concept to practically microscopic 'sections', and you have an infinitely-expandable multitouch screen. (Unlike modern capacitive screens, which have to be built in a way that lets them distinguish a certain amount of current changes, as I understand it.)

And, I just had another revelation while typing this: When you scale these 'sections' to the point where they're small enough to be barely distinguishable visibly, something else happens - you can make the distance between the two screen layers smaller, and the actual screen material more flexible: Because doing that on a normal resistive screen would make it possible for the screen to just 'sag' on itself under it's own weight, or would make it too imprecise - however, having these microsections means that you can afford a more 'flexible' screen material, and a smaller gap between the two screens. Which means that suddenly, creating resistive multitouch technology simultaneously allows you to increase the sensitivity of the screen as a side effect. Which more than explains, in my mind, how Stantum can claim that their screens can both process infinite touches (they can process however many touches as they have cells on the screen, and that's in the thousands on a modern screen, which is more than you'll ever realistically be able touch the screen with simultaneously), and how they can claim great sensitivity - making the resistive screen support multitouch also makes it practical to significantly increase sensitivity.

...Actually, the whole thing's kinda genius. Like, I'm really sitting here going "holy **** that's brilliant".