Intel, in it's press-room shared some info on the Coffee Lake generation succesor, Ice Lake. Coffee Lake is fabbed at 14nm, Ice Lake will be fabbed at 10nm. Ice Lake intially will be followed by Cannonlake, low-power mobiele chips

It is curious as to why Intel already talks 10nm:

The Ice Lake processor family is a successor to the 8th generation Intel® Core™ processor family. These processors utilize Intel’s industry-leading 10 nm+ process technology.

Judging from that screen-shot, in 2018 we'll see the firrst Ice Lake announcements. But but first up of course is coffee lake, with a new Chipset and up-to 6 core processors. Based on earlier info, in the second half of 2018 you'd then see desktop processors based on 10nm Ice Lake.