Netbooks might be a factor in the other direction when it comes out. I've been an OSX user for years, but am planning on buying a netbook with Window7 when its available.
"but am planning on buying a netbook with Window7 when its available"
Me too, but I plan to rip it out and install a decent OS as soon as I turn it on ;-)
The days of $100+ OS are over. They'll milk it the most they can but they better embrace for impact.