skylake or kabylake

Solution
6700k, or better, 5820k. The difference in games might be big on benchmarks, but while you're playing, your FPS doesn't stay at a set minimum, set average, set max, it's all over the place. Meaning you won't be able to tell the difference between the two outside benchmarks, because the FPS in games is fluctuation too often. Intel shoots for 5-10% IPC increase, and for all their new products, you will pay a premium, meaning 6700k is very likely going to be better value (price to performance).


All the best!
6700k, or better, 5820k. The difference in games might be big on benchmarks, but while you're playing, your FPS doesn't stay at a set minimum, set average, set max, it's all over the place. Meaning you won't be able to tell the difference between the two outside benchmarks, because the FPS in games is fluctuation too often. Intel shoots for 5-10% IPC increase, and for all their new products, you will pay a premium, meaning 6700k is very likely going to be better value (price to performance).


All the best!
 
Solution
I think the first question is what do you currently have in your PC? If you have an i7 Sandybridge or earlier then getting an i7 Skylake is probably a decent upgrade although the Sandybridge still isn't a write off. If you're running Ivy bridge then I would wait and see what Kabylake has to offer and if you've got a Haswell CPU I don't think it will be worth swapping even for Kaby Lake.

For a lot of applications including games a CPU upgrade doesn't make a huge difference if you're going like for like across 1 or 2 generations. Swapping series can be a better idea so changing an i3-4160 for an i5-4690k is a much better gaming move than spending more (motherboard, RAM, CPU) on switching to an i3-6100.

Waiting for the next generation can turn into a never ending cycle with PC's. There will always be something being discussed as the next big thing it is really only worth holding out if the release date is fairly imminent. I doubt that Kabylake is going to destroy Skylake to such an extent you regret buying now.