I think that the form factor of the Pre would definitely appeal to those of us that love the capabilities of the BB but would also like to see the touch for games and screwing around.
Specifically, I would love to have the full QWERTY keyboard but also have the nice large touchscreen. I know the G1 has this but the sliding mechanics make it a PITA.
Anyway, I doubt any of this will be an issue as Palm WILL see a revival with this new phone. It fits right in the niche between us crack(berry)heads and the iPhone fanboys. ****, if there were a GSM version of it coming out, I would be a little tempted.
::Edit:: If RIM were to make a phone with a similar form factor to the Pre, it would have to maintain the BB keyboard (exactly like my 8900) because the Pre keyboard looks like hammered poo.