The most fun & exciting experiences I've had with software from Microsoft have consistently been the joy of logging into a fresh install of Windows.
The sheer joy of it, lack of clutter, the responsiveness (my computer routinely feels one year younger after a new install) are all things that will wear off quick enough, but I'd hope Microsoft engineers got around to do more to preserve this feeling, as I find the blank desktop really difficult to dislike.
From the untouched, virgin desktop it's exceptionally easy to set out to do real work. A new browser, downloaded in less than 3 seconds (Gigabit downstream is one of the things I will miss from studying), new developing framework in less than 60 seconds, crisp graphics drivers in less than 2 minutes.
If they're really serious about improving Windows, the pristine look and feel of a fresh install is what they ought take a look into..