they have been saying software will incorporate four cpus ( esp. games) for two years now) from what I can tell, its not gonna happen. Future proofing is just a word the manufacturers throw out to get people to buy stuff they don't need. Like Sata 3.
for gaming purposes two cores is fine (the 4 core bandwagon has been around for 4 years) and the i5-650 is a very capable gaming CPU. The i5-750 or 760 is the better gaming CPU though so if you have the money, may as well get that.http://www.anandtech.com/bench/Product/144?vs=109