I saw these videos and it made me want to try a touchscreen with OS gesture controls really badly, trouble is no-one seems to sell touchscreens near me :/
Touchscreens are nice, but only for limited applications -- one big problem is that for extended use, you will wear down the protective film on the screen very quickly. spots that are hit often will start looking dull, and before long you'll have a hard time even seeing the screen under 'em.
The protective layer generally isn't replaceble, and if you use an aftermarket 3rd party protector it will be both hard to get on straight, and slightly affect the crispnes sof the image thanks to the additional layer of plastic.
In addition to the wear&tear of touching the screen over extended use, you also have the immediate issue of fingerprints and grease over your screen.
You can mitigate that by using a stylus, but those are very easy to lose on your average computer desk... And it's yet another 'controller' to reach for, interupting your workflow. :-?