Doubtful. pc games are already a u-haul stuck on the back of the game console car. Mac games are a skateboard on a string attached to the u-haul.
In other words, pc games are already taking a back seat to console games. Games(with the exception of certain genres like mmorg, and that could very likely change with the next gen boxes) are often now developed console-first, then ported to pc(EA, for example). Seems to me the pc is following a similar track as the mac as far as gaming goes. Obviously, the pc game market won't die(the mac game market hasn't died either, its just in a vegetative state), but its losing its leadership. The game developers are following the money. And the money is in consoles. So, barring a massive marketshare increase by Apple, its fairly unlikely that game developers will bother with Apple, excepting porting companies like Aspyr and Macsoft. And of course, Blizzard. 😉 They must be getting some sweet gift baskets from Apple at Christmas... 😀