(Lion is covered by an NDA, so I’m only discussing info that’s already publicly available elsewhere.)
Over a year ago, I complained on this blog that Mac OS X doesn’t allow users to resize browser windows from any side or corner. Well, that has finally been fixed in OS X Lion. OS X is catching up to Windows!
Using a three-finger swipe to move between screens is surprisingly pleasant. I wonder if there’s a way to get Spaces in Snow Leopard to behave this way.