Honestly, I was not a huge fan of 90s Microsoft, and I certainly never used this thing, but I really miss this kind of fun and whimsy and the bicycle-for-the-mind (even if you're only going to ride in circles in front of your house) quality of 80s-90s personal computing and desktop applications.
Their circa ~1995 3D Movie Maker was pretty cool, though.
Microsoft open sourced 3D Movie Maker a few months ago: