If you wait for the next best thing, you will wait forever.
If your need is now, buy now.
Game designers want a large market so they will not willingly design a game that needs a top end cpu.
If you can afford the extra $100, buy a 4790K.
Intel will not offer a replacement unless it is a better performer at a better price, I expect skylake at stock to be perhaps 10-15% more effective.
The big question is how well can it overclock.