Actually, they couldn't. The TI OMAP3- series uses Cortex A8 architecture, so they'd have to refit the phone with a completely new board altogether, or, translated, rebuild it. I'm sure we'll see such a thing from them eventually, maybe in the middle of 2010?
If his posts are longer than 3 lines long, I get bored and skip it. But I'm a fan!
Just you wait. Your journey into getting screwed by Nokia has only just begun. I'm not saying it to try to be a jerk or anything, but given your recent phone history, you haven't even begun to understand how good they are at stringing their customers along. You're going to find the N97 "good enough" and secretly hope that their next model will fix all the issues you have (memory errors, slow operation during critical functions, poor gaming, etc.,). Then you'll buy next year's flagship, and the next, each with a minor improvement filling the void created by the previous device and by the time you've spent several grand with them, one day you'll notice what the competition is doing and be mad as hell.
I never thought I'd say this, but I would probably recommend waiting for the next iPhone rather than waste $700 on Nokia's bridge to their next high-margin flagship.