I think the best thing Apple can do is add some more customization options to 10, for us older 'bookers. That's all I want really. I know with my ancient powerbook, that I'm never going to see qe. It's just not possible. But what would make me happy, and something I've posted here before, is a way to turn off the more processor intensive visuals, ie live window resizing, etc. Give me a pref panel that lets me selectively turn on/off visual effects. They've started with the ability to change the way the dock works, different minimizing options, etc. I just want more options! Honestly, my mac is still plenty fast for design work, but it really chokes on live resizes and such.
Windows xp gives you these features, and it'd be something I'd be more than happy if Apple were to "steal" this idea.
j5