Another article that makes me want to wait awhile. The MacBook Pro killed the Mac Pro in some tests and they were using a configuration out of my range.
Unless Adobe and a few others adopt Apple's dual GPU mindset, the Mac Pro won't really perform like I want. 4 hours to render a C4D is sort of unacceptable for that kind of money.
IF the software companies get on board is really the big question. It could be two years before Adobe rewrites their code. By then, there will be updated versions of the MP.