I know how outdated the MBPs are.
Why do you think they will switch to Radeon?
They offer lower power envelopes and higher performance. I suppose I dont know for sure, but they switched to the 4/5xxx series for the imac and if they DONT upgrade to ati they will continue selling outdated hardware, which isnt Apples style. Apple always offers good hardware when it launches and simply keeps it on the market a little longer than they should.