Perhaps because the things other companies make are utter shit in comparison, even taking into account the things Apple might leave out that you would like?
Yes. This. A million times. I'm required to use a windows pc for work, and I'm almost homicidal at the end of the week with the little things that work on my mac (at home) which absolutely don't on my work machine.
It's not even that I consciously agree with everything the mac does, just that when my mac does something stupid, there's some logic to why it does it, and when I use windows, the logic is all sideways. Don't get me started on linux. It acts like the schizophrenic child of frankenstein it is. Saying it's better than a windows box is like saying having one leg on fire is better than being entirely on fire.
Personally, I'm thinking the apple tv looks like finally a usable product, and would be 100% worth buying if it did one little more thing. Hulu. (Although right now, I'm using understudy with front row to do hulu and netflix, so there's no reason to go out today and blow $100.)
The ipod revamp is pretty sweet, the nano looks like a nice interface, the "all clickwheel" shuffle looks usable, and at $50, a nice entry-level device. The 4.2 announcement to bring more usability to the ipad is pretty sweet, too. All in all, a nice presentation.
Yes, I've drunk the kool-aid. But my mac has ksh, so it's all good.