Manddy edited his post and took out the misinfo. Just to clarify, the currently released 7th gen are only the low end, low tdp models which is why they are so slow speed. These have very low tdps, 4.5w and 15w and are used in tablets, 2 in 1 laptops, thin ultrabooks, that sort of thing. The speed is actually higher vs the same tdp skylake. Skylake 4.5w cpu is 1.1ghz-2.8ghz and kaby lake 4.5w cpu is 1.3ghz-3.6ghz. The higher end models will come out later (January?) with the 7700k supposed to be 4.2ghz with 4.5ghz turbo vs the 6700k which is 4.0ghz with 4.2ghz turbo.
Don't forget that this gen is only a refresh: an optimization of skylake. It's not going to be an improvement like other gens and suspected to have the same ipc just like...