The one thing I like about it is the browser tabs. I find Apple's way much slower. I just want to tap a tab and be right there, not zoom out to thumb-nail view, pick a picture and zoom back in. If you copy paste between web pages, the tabs are way quicker.
If they offered server-side compression like Opera and the ability to not load images, that would help greatly, especially on 2G. That network is soooo slow.
The multi-tasking is interesting but just multiple threads inside one program, not separate programs. It'll probably have an RSS feeder, facebook widget or whatever.
I don't think in-app multi-tasking is going to be needed - Apple have hinted they are working on multi-tasking.