I've been wondering why nobody is talking about that. The commercial even touts their netbook as the culmination of all they have learned. I'm considering getting a netbook for my wife for Christmas (maybe even the Air) and was in Fry's yesterday. There were so many people crowding the netbook aisle that I just gave up and went to look at TVs.
One more thing, for those who say the Tab is just a larger Galaxy S; the same thing was said of the iPad/iPod Touch and, as it turns out, it's not. Just the fact that I'll be able to put all of the widgets that I'd like to have (but don't fit) on the main screen of my EVO is a big plus. The email and calendar apps take excellent advantage of the screen size, and reading Kindle books (even with the phone version of the app), documents from work, and surfing the web are a whole different experience from my EVO.
And, since the Tab is so portable, I can go back to carrying a smaller phone.
There is plenty of room in the market for both sizes.