With the exception of JRPGs, this is also true of the PS3 / 360. The problem is you have different tastes. If you think MGS4 is the highlight if the gen I can understand how you'd feel that way. That would definitely be bad news if that was this best this gen could offer.
MGS4 is pretty damn close to the best console game of the gen. The only ones id put ahead of it are Demon's Souls, Valkyria Chronicles, and maybe Arkham. I havent played Vesperia yet though and Ive only heard good things, so here goes nothing.
The problem is the amount of power the western culture has on gaming now. The "i have the attention span of a dog" group in particular.
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Currently playing: SC2, Civ 5
Next up: eh ; Awaiting: meh