There are two things that keep me from jumping over to the Mac: immediate hardware customization (can I upgrade a Mac's video card when a new one comes out? Can I get a PCI-Express Mac? Can I get a Mac in a small form-factor case? Will that new Logitech MX1000 mouse work on the Mac?) and gaming (I can't play Half-life 2 on a Mac, period.)
I'm sticking with a customized version of Windows until other OSes get some versatility to them. When I can run modern games on the Mac and be assured that any piece of hardware I may want to buy will work, then we'll talk.
OS X does have a great desktop design, at least. I wish Microsoft would hire some talented graphics artists.
I'm an old man so games and design are lost on me.
I appreciate the utility of Aqua but where I really get my money back on the Mac is X11 based stuff.
Yes, for the video card. Yes on three 64-bit PCI-X slots. Yes on small form-factor (if the new iMac takes up little enough desk space for you). Yes for the mouse. Maybe no on specific games.
. I wish Microsoft would hire some talented graphics artists.
Or at least one user interface specialist with the power to tell programmers they can't put their stupid GUI-ruining ideas into Windows.