A new chipset for a speed bump. 
https://www.techpowerup.com/225407/intel-core-i7-7700k-kaby-lake-sandra-scores-surface

Someone with access to a Core i7-7700K "Kaby Lake" processor and an ASRock Z270-Extreme4 motherboard put the chip through SiSoft SANDRA 2015 CPU tests. Engineering sample or not, the clock speeds of the chip appear to check out with those of the lineup as we know it. The core ticks at 4.20 GHz, with a maximum Turbo Boost frequency of 4.50 GHz. You also get 8 MB of L3 cache, and HyperThreading. The benchmark confirms that Intel is working on a new platform refresh chipset, with the Z270 chipset succeeding the existing Z170. Existing LGA1151 could support the new chips, with BIOS updates.
https://www.techpowerup.com/225407/intel-core-i7-7700k-kaby-lake-sandra-scores-surface