Maybe
The fact that the switch to native programs is going far quicker than I expected Quark already have a Beta Native version available... That shocked me in the keynote... Dont imagine it will be long before Adobe release a patch for CS2 for improved intel peformance, and shortly after CS3 with full native/universal performance...
Other Pro Apps by March, with cheap $49 upgrade cost for Final Cut...
This is nothing like the switch from os9 to osX
By March the iMac 2Ghz Dual Core could feasibly be nativly faster than the Dual 2.3 Powermac....