Nokia would be outright stupid not switching to Qt/KDE in mid-, long-term. PB singlehandedly brough to Nxxx really big percentage of projects available on garage.maemo.org and dispersed on Web thanks to power of Qt/KDE libraries - including such crucial ones like KDE-PIM and KOffice. With minor support from Nokia it could be even easier.

However many decisions from Nokia regarding Internet Tablet series are bordering on stupidity...