I hope Nokia can push the three-homescreen paradigm into Apollo. I really like it and think it is a smart way of doing things - in WP's case, it would probably be notifications, tiles and app list. I also think that Microsoft should think about doing limitless multitasking and possibly implement the Nokia method - having a grid of windows shows you much more content at one time.
To be honest, I would totally buy a MeeGo handset if it had a future. The UI is at the very least as good as Metro (IMHO of course), and it will be easier for developers since it isn't as easy to f*** up.
I'm quite interested in seeing it in person. I always thought that what is basically plastic can't be that great to hold in your hand, but this is the second review I've read that says the hardware/build is basically the best they've seen
I've had a hands-on with the N9, and let me assure you - it feels extremely solid and does not have that plasticky feel you'd get from the Samsung Galaxy range. It felt amazing in the hand, and the Sea Ray could very well be my next handset.