Just started playing with Windows 7 beta and like what I’ve seen so far. It’s only running in a Virtual PC window, but with a single CPU and 2GB RAM allocated (which most target systems would have) it’s quick and responsive.
The main thing you notice very quickly is the absence of UAC – it’s still there but Microsoft has found the right balance at last between protection and intrusive pop-up alerts. Instead of OFF/ON there are now four or five levels of protection – I’ve left it at the default setting – whereas with Vista I turned off UAC very quickly because it was annoying for a power user.
The new Taskbar with icons rather than the icon+text of XP/Vista takes a bit of getting used to but it’s a better use of the space. Hard to tell the difference between a running app in the task bar and a quick-launch icon (next to the start button).