It seems as though Devloping for the Revolution will be quite a breeze. Here are the facts.
Due to its market window it will probably be more powerful than Microsofts next system.
It will have a similar architecture to Gamcube, and will use the same API. So, porting code from Gamecube to revolution could be copy and paste.
It has a similar architecture to Xenon perhaps, and porting from there might be pretty easy. Especially if your a company using some sort of middleware.
Gamecube actually had the best texture pipeline of any system. Though it seemed to be overshadowed by Xbox's use of shaders. Revolution should have all of the shader effects and more.
PS3 might be a pain to develope for, perhaps Games will take to long to make for ps3 or seem rushed.
Technology has progressed significantly since Gamecube, while the gamecube was 485 mhz....Revolution could be anywhere from 3 to 5ghz
graphic technology has progressed alot as well
http://www.ati.com/products/radeonx850/index.htmltake a look at those demos.....