Mac OSX has never been a gaming platform. Still, it would be wiser to let the other available technology catch up. This is a mismatched display/GPU solution, and time should be a serious factor here. This just provides more evidence as to why the Macbook series is considered by most geeks to be an extremely expensive Facebook platform.
Despite that, putting a GTX 680M in this system is not an impossible task, especially for the "innovation" and "quality" expected from Apple. If the clock speed is sufficiently cut, and the vcore with it, the GTX 680M would provide the necessary power to drive a 2880x1800 screen in the area of gaming. It might be time for Apple to consider a more aggressive and efficient cooling setup, as my understanding of their current setup is quite humorous in nature, not unlike that of the Xbox 360. It is important to note that the GPU is not always tasked at 100%. The cooling fans would only need to provide extra noise and extra airflow under a game execution scenario. If one is going to select a 2880x1800 resolution framebuffer, then one must also select sufficient hardware. It's quite the cop-out.
(To save extraneous conversation, I do realize there is a cooling fan in the MBP, and that there is a front/bottom to hinge airflow pattern. When the system is disassembled, the cooling equipment is rather sparse and even with a fan seems far more passive in nature.)