There is a documentary I'm watching right now called 'The Future We Will Create: Inside the World of TED' from 2006 TED conference in Monterey, CA. A research scientist shows off a version of Multitouch that can use all 10 fingers, and is something like an artist's desk. It is the second lecture into the documentary and I wish I had a YouTube clip, but it gives a good idea of what Apple and others may have in the works very soon
Suddenly Microsoft's coffee table computer doesn't look as silly of an idea. Pretty cool!