Multiple-point touchscreens. Watch the video. This technology needs to be mainstream, like, right now. If we’re not all interacting with computers like this and resizing our photos by pulling the corners apart and stuff within five years, there’s just no hope for technology.
I reckon it won’t become mainstream as people dont like big changes. We still use qwerty keyboards. Though using two hands does look much cooler than just one. I do often find that after using my pda for a time I try and use my monitor like a touch screen. So We shall see.