Windows 7's going to be a waste of money if you've already got Vista... they're gunning for the people that didn't buy Vista because of the negative reception. Most of the serious problems with Vista have already been addressed with the service packs... assuming they're going to continue releasing those, I don't plan on cashing out for such a minimal upgrade. Check this out, from the techreport: http://techreport.com/discussions.x/16222
albinojokerman's comments