I've got a touchscreen on th epPC I bought a few months ago. I hardly ever use it. The main impact it has on my computer experience is that one of our kittens will sometimes sneak up and change something by batting the screen with a paw, so I lose the screen I've been working on.

I'm pretty sure that what this kind of change is about isn't anything to do with helping computer users, it's to do with imposing obsolescence on us so we have to buy new stuff.