Grand Theft Auto V is already a nice-looking game that runs well on the PC. As nice as it looks, though, it still doesn't look real. Martin Bergman on YouTube is teasing a mod for the game named Toddyhancer that can make you forget you're looking at a game at first glance.
Is this the real life? Or is this just fantasy?
If you want to look up close, Bergman has a gallery of stills from the game taken with the mod enabled, as well. According to the video's description, this look comes at a relatively high performance cost—Bergman says he gave up 10 frames per second, and he expects most users would drop 10-40 frames per second. He doesn't say where his frame rates started, though, so it's hard to say how much of a hit other systems may take.
The Toddyhancer mod isn't available yet, but Bergman says once he has it in a finished state, he'll make it available to others.