Really... I'm sure the users who had to move to Windows to get 64 bit Photoshop CS4 would like a word with you right about now.
Who "had" to move to windows for simply a 64bit photoshop? There's nothing you can't do in 32bit photoshop that 64bit enables you to do. Surely there's a small speed increase but that wouldn't cause anyone to migrate to a whole other platform instead of waiting for the next CS release.
Photoshop have been working better on Windows for a long time now, so if speed is the only thing people care about, why would they wait to migrate anyway? They should have migrated a while ago.