Vista RTM is now available for MSDN susbribers to download online and I am currently downloading it. The current reading shows it will take another 4 hrs for it to complete. Can't wait to upgrade my current RC1 to RTM and make this my OS to work on. What ever little I have worked with RC1, I am amazed by the great new UI support that it offers.
Note that UI isn't the only new thing coming with Vista. It has .net fwk 3.0, IE 7, IIS 7, user access control (UAC) and all that good stuff. One point against UAC is that it seems to support only dual modes - ON or OFF. I would have liked it to support some middle path also.