That isn't true at all. MacOSX has had hot-corners for years and years, and it's a feature that i have been using in OSX for longer than i can remember.... compiz also has had hot-corners (and hot-edges) for a very long time, as well. Both compiz and MacOSX allow you to customize hot-corners, with whatever function/use that are available.
The kind of people who do real work on Redhat-based desktops (e.g. Redhat, CentOS or Scientific Linux) tend to be the people who hate Gnome 3 because it gets in the way of that work, and also tend to be the people who get to decide what OS will run on their servers (i.e. Redhat or... something else).
Ultimately I don't care a whole lot about Gnome 3 either because I'll be switching to a different GUI or a different OS when Redhat pushes it out. But I honestly don't understand why Redhat is paying developers to push a tablet GUI on us. I am really, truly, mind-bogglingly puzzled by this decision.