Bottom line: I got tired of windows. My Dell desktop was terrible beyond words, and windows always seemed to be causing problems of some sort or another. I moved to an iMac as my personal computer in 2004 and it was a genius decision.
I had used Apple machines since 1989 when my dad brought his Mac all-in-one home from work. I've always prefered them, but was not willing to spend for one.
Now, I don't put a price on frustration and misery. OSX does what I want, when I want it to, without the hassles I was used to. So I spend twice as much initially to keep the computer twice as long...doesn't seem like I am losing anything, as my Dell lasted about 2 years before going to crap, and my iMac is four years old and still cranking away without a single issue of any kind.
My iPod touch does nearly everything I ask it to, and the things I want it to do, it does very well.
Would I like a 10" tablet mac do streamline some stuff? Sure. I'll wait for it.