First, they've had such screens, admittedly with a bit less sophistication, as bar cash registers for years. It's just a different application of some old technology.

The other thing is, I've been telling people for years that they can point to something on my screen, but they better not touch it. I hate cleaning the finger prints! 😛

Last but not least, I can see a whole new "repetative motion injury" coming out of this... put touch screens on the desktop and watch people start complaining about shoulder and neck pain from hold their arms up all the time. If they put it horizontal with the desk surface, watch them really start complaining about neck pain.

I think they already have it and I believe it's quite expensive... but I think the touchless "look" screens where you wear a special set of "glasses" that figure out where on the screen your eyeballs are pointing would really be cool. But that's all it would be is really cool. Try typing something that way.