It also forces you to bend over the top of the table if you want to do anything - you can't even slide your legs underneath. Apple's idea of building a webcam into an LCD screen by having sensors next to each pixel is probably a better way of doing something like this. It's a nice idea, but a very poor implementation.

I'm not anti Microsoft usually but that's a very good point its not ergonomic in the slightest you have to stretch over a table to do anything! You'll end up doing your back in!