Well, let me tell you this, I myself was deciding about it like a month ago. I went with I7-4770 in the end. To put it bluntly, I think Hyper-Threading is more of the psychological thing, you know the insecure "but what if" one.
I did a lot of research and the outcome is that most probably Hyper Threading won't be a major factor in the nearest 2 years at least and I very well doubt it will be significant after that either. The "more and more" games part is now realistically like 2 games, where you can actually see Hyper Threading doing something when you look at numbers, but the difference is small, to put it bluntly - you won't give a damn about getting let's say 47 min FPS vs 44 FPS in that rare game which actually benefits from HT.
I went for I7 just for a peace in my mind, but realistically it does not matter much anyway.