Taken from slashdot
"The Inquirer (as well as a more biased Team Xbox) is reporting that the Playstation 3's GPU will be a little less powerful than a GeForce 7800, which would also mean it's less powerful than the Xbox360. If true, what could this mean for the release of the PS3, a year later than the Xbox360 is released?" From the article: "It's all awfully confusing we know, though it is an interesting tech mystery to try and get to the bottom of. Of course Microsoft and Sony engineers all know exactly what's in the difference between the two consoles, but the marketing people want to tell us that their console is twenty times better than everyone elses, so we must wait until someone rips the two boxes open and benchmarks them..."
If the PS3 is less powerfull than the GeForce 7800, i dont think that Oblivion will even run on it.