None of you knows.
However, there are several facts we can look at, and assumptions this thread makes that changes this question, focusing on the 360's assumed shortcomings:
The real question being asked is:
"Is the 360 capable of having a game with the graphical quality of Killzone 2, or better?"
The answer can only be an opinion.
However, lets examine that question.
A. Gears 2 isn't lightyears behind Killzone 2 in real screen for screen graphics.
B. However, Gears 2 is fully functional with a split screen multiplayer component.
C. The PS3 isn't regularly putting out games that look better than Gears 2.
D. In fact, only one has been released.
E. Who is to assume that the same thing couldn't happen for the Xbox 360?
In the end nobody knows, and few should care. The difference in high end graphics is only noticable to those who fanboy in such waters. Crysis beats the ass off Killzone 2 in every conceivable way(KZ2 fanboy Crysis hatethread not withstanding) graphically, yet nobody here plays up the PC, it has too many faults otherwise, as does the PS3. Most notably the price. KZ2 doesn't look TWICE as good as Gears 2. Why is it twice the price?
I don't need your console war.
It feeds the rich while it buries the poor.
You're power hungry, spinnin' stories, and bein' graphics whores.
I don't need your console war.
NO NO, NO NO NO.
