yeah a long video of apps being resized does not equal great multitasking. I have a friend with a galaxy tab 10.1 I think, with that feature. Here is the problem, those apps are not running at the same time. You use one, while you can look at the other, then touch the other.........lag as android switches resorces........failure. On my n900 the apps that were in the background are not frozen, they are active, if you had a n900 with a screen that size you could do way more. Its cool for glancealbe info, kinda, but not well implemented and missing the functionality that makes it worth doing it.

and yes videos can play while you use another app, thats one thing that they wrote code for, not universal for real true multitasking, like i can in my desktop.