Technology advances at an ever increasing pace, why wouldnt there be a system with better graphics than the PS3 if we already have the technology that surpasses it(PC)? With SLI cards you can have several gigs of video memory, and RAM is quite cheap nowadays as well so you can have 4 gigs of ram easy. Dual core CPUs are also quite powerful, plus I was reading about advancements in the field of parallel processing(if Dual core is powerful, imagine 20+ core cpus) By the time next generation starts current consoles will have several price cuts and still be profitable so developers will be able to put in even more powerful technology at the price of current consoles.
Proud owner of the following gaming devices:
PC, XBox 360, Wii, PS2, DS, PS3