It would be pretty maddening to keep losing the application you're working on because of the infinite scroll.
In RTS games you have keyboard shortcuts to return to your unit groups, bases etc to mitigate that, but there you're supposed to jump between points of interest while for general use you tend to keep the same point of interest for a long time...
I don't have much to add except that I wonder why something similar hasn't been done already? I mean, it's an UI that works fine in RTS games, so why wouldn't it work for application windows?