IMHO Vista isn't ready for public. It need more time. I'll get it once it gets released to get used to it for a few months before I build a new computer on Q3 2007 but I rather wait 3 more months for Vista than having Windows ME Part 2. I remember that my father installed ME and 4 days later he went back to 98SE
Microsoft is still the leader but IMO I think that if they rush Vista and it has a lot of problems it can be the beggining of the end for Microsoft. For example I'm not using Ubuntu (or any othe Linux Distribution) because they dislike my computer (the current kernel and hardware detection system) but it will probably be fixed by the time Vista comes out and dual-boot with Vista may be a fair option for me