Not sure what you all think of Kim Komando, but she mentioned in a quick radio blurp that if Microsoft doesn't get it in gear they will be the next IBM.
I have tried their computer's out a little in the stores as well as a co-worker showing me the difference between his Apple laptop and MS ran desktop. Apple seemed to run better...
My hold up is the fact I use a lot of MS products (ie MS office pro & Outlook) the MS version for Apple isn't getting very good reviews due to compatibility issues. Plus their computers are much more expensive which leaves me with MS ran puters as the only choice.