Apple has to have a few very compelling reasons for developers to continue making apps for Mac OS X. At first I thought people would jump on CoreImage and other niceties that Apple introduced in Tiger, but it seems that only Apple software has really taken advantage of it. I think it's great that you can officially and easily dual boot on an Apple machine, I'm just afraid of the possibility someday that when you boot up Mac OS, the only software you'll find there is made by Apple. I'll be curious to see what the developer's conference this summer brings. I would like to be able to stay in Mac OS as much as possible, leaving Windows for only that one or two apps (and the occational game).