the ps3 has far more support then the gc ever had, you can't even compare the 2. Yes, people have said it's hard to program with, but they didn't say "we are too good for it". Ea, capcom, SE, Sega, Bethesda and many more have supported it and rather then make excuses, they have over come the cjalkange. Some have even created better versions on the ps3.
Therefore, saying the console is going to die due to it's challanging architecture is far fetched and ignorance. If other devs can do it these days without a problem, valve has no excuse.
It's like a gamers saying " oh no, from 4 buttons on the nes, we have gone to over a dozen buttons on a controller with the addition of joypad and joystick in one. Oh no, that's too difficult and challanging, I refuse to play and any system with such controller will fail and it's a monstrosity". It's like saying ninja gaiden is a shit game and shouldn't sell because it is far too challanging.
You either take on the challange or you run away from it. We all know the cell is a challange but it is far from impossible.