I'm already surprised when downloading the plugin:
Why the need to lie? Don't write 1MB download, when it is, in actual fact, closer to 5MB.
After installation, a quick restart of Safari - and off to try this new Flash, air, QT "replacement" - tried out the 80th Oscar Awards Ceremony - which starts by resizing my browser window (UGH!) - and then after clicking on one of the video previews - goes on and crashes Safari.
Nice try, Microsoft - but I think I'll stick with Flash (or whatever else is there) a bit longer.