How many Multi-Touch points can an iPhone/iPod touch/iPad have at the same time?
I am curious as IIRC (but forgot where the article is on the Internet), if a touch surface is wanted to be able to detect more than 1 touch point at the same time, then that touch surface needs adding 1 more conductive(?) layer. (e.g. 2 points -> 2 layers, and so on)
So I wonder how many these layers are on the iPhone / iPod touch / iPad or even the trackpad on every MacBook (Pro).
It's at least 5, because that's how many individual keys I could press at the same time on the piano keyboard in the "Virtuoso" app. It played all 5 notes and highlighted all 5 keys as they were pressed.
I couldn't physically fit any more fingers on the screen.