I know it all comes down to hyper threading and all i do is game. I have been told time after time the 4690k is fine for gaming now. So my main question is..... If i plan not to upgrade my board/processor for 3-5 years should I go with the extra $100 for the i7 4790k? Do you think gaming will be mutlithreaded properly in the new few years. MY other question is IF i go with the i5 4690k and gaming say in two to three years is multi threaded will not having an i7 be a huge difference or just very mininmal? Last question. If i go with a 4690k and then in 3 years want to change it for some thing newer that is multi threaded can the new processor just be applied to the same board if compatible or is it on there once it is pasted on?
you can upgrade the CPU to a newer one in the future. Z97 will officially support Broadwell; and I've heard rumors (well one) that it will also support Skylake.
Anyway, newer games are starting to benefit slightly from more than 4 cores, but games are still designed for the lowest common denominator -- which is still dual cores....so a 4690k should be more than enough for the next few years, and by the time games truly benefit from hyperthreading, a 4790k will probably be ready to be replaced anyway -- As of right now there are only a handful of games which can utilize more than four cores (namely BF3/4).