Coffee Lake (14nm++) is launching in Q4 2017, https://www.anandtech.com/show/11843/prices-of-intels-coffee...
Can a Coffee Lake CPU work on a Kaby Lake / Skylake motherboard?
Can a Coffee Lake CPU work on a Kaby Lake / Skylake motherboard?
No. Although the socket has the same number of pins it is not compatible with Skylake/Kaby Lake. The socket will probably be called LGA 1151-v2 to distinguish it from the earlier socket.