I don't think it will keep up (not with the PS4 at least), the i3 may be a stronger cpu per core but the 750ti is a much weaker GPU than what's in the PS4 and most games are gpu heavy than cpu heavy. There's also the thought that the PS4 CPU has more cores than the i3 and that better multithreaded code over these cores are still something that will be improved going forward, there's also the possibility of an extra core being released to devs which can further boost some of that cpu deficiency.
Since GTA was not built ground up for these consoles I can understand some of the odd niggles but a game built for these consoles from Rockstar should produce more stunning results. In essence, there's a lot of improvements that we anticipate on the CPU side for PS4 and that includes GPGPU which can further help with cpu tasks, this has hardly been used yet and Cerny declared that we would see tangible results in year three of the console's life.