Stability
"...but it's built on that very stable core Vista technology, which is far more stable than the current Mac platform, for instance."
OK, and you have actual data to back this up? Thought not.
I've got a Mac and a PC and the only real difference I notice is that my Mac does what I ask it to and my PC does what it wants - normally running off to find out how many files I have beginning with 'G', or something, when I'm in the middle of something important.....
Stable - yes, useful - perhaps, convenient - er...