the "W" word
I'm constantly on the edge of buying a Mac, but am still a Windows user.
This is the type of difference a switcher would not think of asking, and the video highlighted two ways of multiple monitor support, that I don't like.
I always assumed "full screen" apps worked fine on any screen (like in Windows), and also that you can drag or straddle between screens.
Both work and home I have two screens, and would be annoyed by either the 10.8 or 10.9 ways of working. I will often stretch a very large Excel across both 24" widescreen monitors.
Having said that, I am looking forward to getting "spaces" which I lost when work moved away from UNIX machines.