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On being asked about his thoughts on the PS4's GPU and whether it can rival high end PC GPUs with the proper optimization, Bottomley said, "I honestly don't know too much about the hardware side of things. My guess would be that since GPU's are constantly being released and updated for PC's, it's only natural that they will outperform a PS4 at some point. I don't think that really matters though.
"If you look at what Naughty Dog did with The Last of Us at the end of the PS3 generation it goes to show just how much you can squeeze out of a system with very clever people on your team!"
http://gamingbolt.com/pc-gpus-outperforming-ps4-gpu-does-not-matter-the-last-of-us-ps3-is-proof-of-that