Well, the difference is whether or not it's "emulation" or true "multitouch". It can still be true multitouch and be a software thing - the ability of a capacitive screen to figure out how many touches are doing what is a software thing too, I think - the hardware detecting differences in current is approximately the same in all cases; the software that calculates the differences is what changes, I thought. Anyway, the way I understood that article, they were saying they used 4 layers of screen, instead of 2, to get the multitouch solution they were using. (Which is basically like having two resistive screens fused together.) Obviously, more technical details than that, but that was the general idea as I understood it. I may have read it wrong though....