OK, so I have two underpowered desktop systems, one with leaking capacitors that I think I can replace, the other that I have just fixed enough to use. Windows 7 promises not to be nearly as bloated as Windows Vista or even Windows XP, which means that having Windows 7 would enable me to extend the life of these machines (before I switch over to Macs!). But there is no upgrade track from XP to Windows 7. One has to reformat the hard drives and do a clean install. OK, there is some merit whenever one uses Windows in doing a clean install once a year. But who has the time? It's a big hassle. Getting new Windows systems now or after Windows 7 comes out would be about as equally as much trouble in terms of reloading everything. So, if I am going to have to go through the expense and trouble, why not just get the Macs now.
Problem is, I don't have the money, but if I did, the lack of a clean upgrade pathway from XP to Windows 7 would definitely lean me away form a Windows system. I just don't get it.