you don't strike me as someone who reads much, so i can understand why you don't see the usefulness of scroll pan zoom on a computer. specifically on large pdf documents with tiny text. maybe I'm getting old, but those tech spec sheets text feel like they are getting tinier.

also not sure why you'd think ppl wave their hands in front of a touch screen all day blocking their view. most ppl are capable of moving their hands out of the way. it's not clear if you've used a smart phone before, but it's the same. though, i imagine if you did, you'd do as you imagine others do with a touch screen.