The site heard Intel originally expected to reveal these chips in early 2018 but the success of AMD's Ryzen resulted in changes to Intel's roadmap. SweClockers talked to major Swedish retailers and got to hear that the launch volume will be extremely limited.
In fact, it appears there will be barely any Coffee Lake-S supply throughout October and November! At the moment, nobody is sure Intel will be able to deliver these processors in volume until after the year-end.
AMD's next desktop processor refresh is codenamed "Pinnacle Ridge", these processors are made on the GlobalFoundries 12LP process and, according to some reports, may arrive as early as February 2018.