It gets dirty and stops working, you end up with curled up hands, even the best ones wobble like an old person when you push on them, you can't type on the things as they are completely non tactile, the touch resolution is so bad that all you can do is finger paint badly, doesn't work with gloves on, and everything is not designed forbthe touch screen apart from metro which is just fucking horrible and the list goes on.
Its like fixing a watch with jacket potatoes on your hands.
I've tried every touch device out there and they are abhorrent productivity saps.
I want a laptop with a normal screen.
I am actually the majority non-consumer of media opinion - you know the people who use the machine to do work.
The only reason we have touch screens is hype