The short clip surely doesn't reveal much, save for the resizable tiles, a la Windows Phone 8. In any case, Windows Phone 7.8 is scheduled to arrive in early 2013, so the wait for the Apollo treatment of your first-generation Lumia shouldn’t be too long.
Thanks to Redsteel for the tip!
Windows is a perfect mobile based operating system for upcoming generation.
Release the update now!!!!
I totally support max's idea