There was once a time when consoles had something that PCs didn't have. They were cheaper, easier to use, more convenient. They dominated the market because they dominated our need to be lazy and catered to. Then this generation happened.
The more one considers the value that the 360 and PS3 have for the end user, the less one is able to justify their existence. Outside of a handful of exclusive games, what edge do they have? What makes them a superior choice? Nothing, declares the Jimquisition. Nothing.