With regard to the Killzone 2 turmoil. To quote myself:
Long before the PS3 launched:
"It will probably take some time before developers manage to get the most out of this platform, as has for example also been the case with the classic Amiga chipsets."
2007:
"SPE usage doesn't per se make a good game, neither not using them per se makes a bad game", but:
"IMO don't make these games genuine PS3 games to judge the power of the platform on, but should rather be viewed as far from optimal ports."
IMO Killzone 2 for this generation of consoles is of similar effect as Shadow of the Beast was with regard to the Amiga vs ST wars. Shadow of the Beast was one of the fist games to really clearly show off the Amiga's added potential vs the ST (of course there have been plenty of even more impressive Amiga games after this and there were impressive Amiga games before that as well).