
The absense of BC doesn't surprise me - nor is it something I demand. It's only relevant in this particular instance where people who upgraded to the PS3 could still play God of War 2 because those original models had BC, where that won't be the case this go around.
And let's face it. Most people don't hold onto older consoles once they buy the new. They either sell it, give it away, or trade up. Only collectors and horders hold on to the old like that.