Don't think I've ever bought a Mac for gaming, well, I'll play the odd game on it but it's hardly the forte of the MacBook Pro.
That said, on pure horsepower alone it would seem the 460 (1.86 TFLOPS) is much like the chip that's in the PS4 (1.84 TFLOPS,) slightly more powerful than Xbox One (1.31 TFLOPS) but nowhere near as powerful as my PS4 Pro (4.2 TFLOPS.)
I'll be happy if it runs SimCity (which it will easily

) that's about the only game I play on my Mac with anything approaching regularity. The rest, I use the consoles. Though if the MacBook Pro (460) can get close to the visuals of the PlayStation 4 (non Pro) as the power would suggest I'll be pretty happy.
And from watching YouTube benchmarks it seems to do at least that if not better. Putting in good frame rates for GTA V/ Battlefield/COD IW/MGS/Fallout IV. So if I decide to play the occasional game on it, I'll cope.
I don't think we'll ever see a MacBook that could hold a candle to a similarly priced Wintel laptop for gaming, that's par for the course. I personally don't think anyone should ever buy a MacBook if their primary concern is gaming. Fine if you're a casual gamer just playing the occasional game and not too concerned with getting ultra high quality visuals and frame rates.
If it can handle most games well enough I'm happy, like I say I've never been much interested in a Mac for games. I'm more interested in its performance in non-gaming apps.