iPod people aren't getting a new OS, AT&T is going to do an update to allow for MMS and eventually there will a 3.1 upgrade unless that is what Apple is allow AT&T to deliver.
AT&T did the smart thing to insure that their system was ready to handle MMS. The fact is that most iPhone users use double the amount of data of other phones. Then again when you have a nice screen and all those apps you actually have something worth using as compared to most phones.
Speaking of Win 7 I have 3 copies ordered when they did the half price special, which really should be the actual price all the time. MS is trying to make up for all those XP users that never upgraded. I got news for them many of them still feel, you burned me once (Vista) you won't burn me twice (Win 7). I think Win 7 is a worthwhile upgrade, but I think it is going to be a tough sell to a lot of folks and even businesses really rooted in Windows XP Professional.
Having used both Snow Leopard and Win 7 I think both of these are improvements over the other and in a sense they both did the same thing. They didn't really change the GUI so much, but did a lot of stuff under the engine to make it run so much better.
I know one thing the adoption rate of Mac users (Snow Leopard) vs Windows users (Win 7) will be much higher because that is just part of the Mac culture, one thing I am sure MS wishes they had about now. I still think Win 7 will do very well, it certainly can't do any worse than Vista. Overall MS will still outsell Apple because there are so, so many more PC's out there.
What is strange is this long time non mac user finds himself suddenly using OS X and really liking it a lot and wondering will I really continue to use Windows much anymore? It will be interesting to see how that bares out over time. One other thing I can say is that until you really own, live with and use a Mac day in and day out all you can do is speculate.