Nobody can accurately predict how long anything is "future proof", but I will say in 3 years, I highly doubt you will see many games that support HyperThreading. Games still have to worry about using 4 physical cores in a quad, before worrying about using the theoretical ones from HyperThreading. Even a lot of games now that use a quad, don't use it that well. Skyrim for example uses 2 cores, and lightly utilizes 2 other cores (if you have em).
Consoles are retarding the evolution of PC gaming, for the simple fact that they're "cheaper". Although, I'm not sure they are considering every person I've known with an Xbox 360 has had to buy more than one of them thanks to RROD. Hell, my stepbrother has had 4 or 5 of them.
At any rate, game makers for PC aren't really going to really ramp up their evolution any time soon, since if they did that, they couldn't stay competitive against the console market. They could do games now that would require quad GTX 670s SLi and really amaze the hell out of you, but the games would just cost too much to the the consumer not only from the required system setup, but the game itself would cost a lot.