No you can't as the PC can always push out better graphics and support larger worlds with more items and effects
See, you've made the mistake there of assuming that games are only about graphics. While I agree that PC Games can have better graphics, that's not actually changing the game experience, especially on multi-platform games.
So can you give me some examples of PC Games, aside from MMORPGs that are PC only because they are too big for a console? Fallout 3 was pretty big, that managed on a console just fine. Metal Gear Solid 4 had a lot of content, that managed just fine..... etc.
I don't play much in the way of PC Games anymore.
Why? Because I'd rather sit on the sofa, infront of a big TV, with a game that just works out of the box and updates itself, that doesn't require me to have certain hardware or to upgrade my machine, or driver incompatibles. Everyone has the same hardware, its a level playing field, in the case of the Xbox, most come with microphones so you can chat.
Finally, when I used to be a PC Gamer, I never played with anyone I knew in real life. With consoles, I can actually play with many of my real friends.
To me, console gaming is the best experience, and I'd argue that currently its the best its ever been.
Sure, I might not get graphics quite as top notch as the PC does, or have the superior aim that a keyboard and mouse does, but that's not an issue.
So as you can see, it's all subjective to the users personal opinion as to what they prefer, there is no, one better platform.