I haven't seen the specs of either OS yet, of course. But I can guess at the hardware that they will both debut on, and I'm fairly confident that both devices will be more powerful than the first Linux box I ever worked on. I'm hoping that the end result will be a full enough set of posix libraries to move the LAMP stack with little trouble. "Little trouble" being a relative term, of course.
I'm a GNOME user, but on my brother's suggestion I tried Amarok a month or so ago, and never looked back. I've used most of the popular music players for linux as well as iTunes & WMP, and I'd actually call Amarok the best on any platform. It's not even close.
One really nice feature is the database integration. I think every application should have this option, and not just because I work for a database company. Amarok can keep all its information in a MySQL database, and that includes the song lyrics it pulls down from the web.