Thanks for the testing and video clip "
cynics"
Very interesting, but I must say I'm rather disappointed.

Yes, I do want the sounds to mix, just as the sounds to mix in OSX or in Windows.
It almost feels like this is not proper multitasking still.
You may think, well that would be confusing, but think that in many games, it's just little sound effects, like in Angry Birds, little Squarks, bangs and cheers sounds.
Or course, you'd not really want two movies or two music file playing over each other, but yes, I'd like sound effects from one app to play at the same time that music or video from the other app is still playing.
Also, pretty shocked that the video on the left froze, when you played the you tube clip in Safari on the right.
Again, I think I was expecting this plit screen to be proper multitasking, as hey, we're only multitasking 2 things, and I guessed the latest iPad would of been able to run 2 things.
Personally I'd rather they allowed YOU to pause one side if you wanted to.
One thing I'm a bit puzzled about. Perhaps you can test this?
As I guess I'm expecting this bit to work..........
Say you are watching a youtube or movie on one side, and you are doing this with a friend who'd somewhere else in the world, andyou are IM'ing them during the film, could be skype or some other chat client.
So you are both watching the film, and sending little comments to and fro as the video plays.
I've actually done this on the PC once of twice. I've actually gone so far as skype chatting when watching a movie on the PC so you can chat little bits at the same time as you are both watching the film.
Would I be right in thinking, on the iPad's, even the latest one, if you tried doing any of this, as soon as you did some chatting or the chat client made a PING sound for message received, the movie would keep stopping for both of you?
I know this would work fine on the Mac or the PC of course.