Ask HN: Do you want to touch the screen?

So touchscreens though an old concept are becoming very popular and I can see the big gain for cellphones since controls generally are awkward.

But for normal computers, what is the real gain? I already have to wipe my screen too often, I don't want to wipe more often. I don't want to be negative to new technology(you usually end up looking like a fool) but I have never really felt like "Damn if I could just click the screen instead!", or maybe I am so used to using the mouse that I dont even consider that clicking would be very nice. Another thing is precision, don't we still need the mouse for a lot of tasks? A finger is quite blunt and clicking a small file might be hard. Maybe the whole interface would be changed though.

(Btw is there a saying for not judging things in their wrong environment? Like "don't judge a book by its cover" but in the form of "don't judge a F1-racing machine on a normal road" or something like that.)