Considering how long hyper-threading has been around for, if game developers wanted to utilise it they would have done so by now.
Only the newest games recommend an i7 and even then, the performance difference is negligible. Whilst the Xbox One and PS4 hardware possibly increase the likelihood of future PC games utilising more processor resources, it's important to remember that cores (that the consoles have) and threads (that an i7 has) are not the same, so software will treat them differently.
Furthermore, the cores in the Xbox One are clocked at a pedestrian 1.75Ghz, compared to the 3.4Ghz of the 4670k (that's before you get to overclocking). Due to the massive gap in single-core power, the development of PC and console games won't be as harmonious as you may think. Console games will have to utilise the extra cores, whilst PC games can make do with less.
A 4670k, when paired with a good GPU and sufficient RAM, will do a fine job both now and in the future.