I hate it. HATE it. the touch screen on a laptop is out of place without any way to disable the touch when I want, it overlays the touch technology on the screen which is visible to me in the sun - as well as the screen medium makes the screen more dim than I would like. Especially in the sun/brightly lit areas.
It really needs to be done right in order to make a great experience. Thus far I haven't seen one.
One of the frustrating things about a touch-screen laptop is that I have a very curious toddler. She likes to touch what daddy is touching, so she will come and grab the screen to bend it down so she can see what I am doing and in doing so clicks on things, scrolls and closes windows.
I never use the touch screen on this machine for anything and so it is simply an annoyance.