This is more a critique against PC gaming rather than a critique of this new beast. It is absolutely stupid to think that you need this GPU to "match" the 360 - PCs have already surpassed the 360 and PS3 a while ago in the budget range. You ARE aware that there are GPUs in $50 range that are more powerful than the one bundled with the XBOX 360, right? Heck, there a LAPTOP GPUs that are better than the 360.
PC gaming has its obvious advantages besides better graphics, namely the trusty keyboard & mouse and modability. MMOGs typically require keyboards, and any game that emphasizes modding is likely to be a better experience on the PC, e.g. I pity those that bought the console versions of Dragon Age.
UNIX was not designed to stop you from doing stupid things, because that would also stop you from doing clever things. -- Doug Gwyn