Intel Confirms - Coffee lake Will not work on current motherboards

At it's online press room some new info was posted on Coffee lake (8th gen) processors. Among the things posted are a couple of box shots of the upcoming 8th generation processor, which lists some info.

That packaging now confirms what ASRock already told, the processors require an Intel 300 chipset based motherboard. Considering that it is on print at the box, yes you will not be able to use the new processors on say your current Z270 motherboard. 

Coffee Lake (8th gen) six-core processors are based on the LGA1151 socket, but will require a new motherboard chipset. They have a TDP of either 65 or 95W. Currently the release lineup looks like this:
 

Processor	Cores / Threads	Clock speed	Turbo 2.0	1-core Turbo 3.0	L3	TDP
Core i7-8700K	6/12	3.8 GHz	4.3 GHz	4.5 or 4.7 GHz	12MB	95W
Core i7-8700	6/12	3.2 GHz	4.2 GHz	4.4 GHz	12MB	65W
Core i5-8600K	6/6	3.8 GHz	4.2 GHz	4.4 GHz	9MB	95W
Core i5-8400	6/6	2.8 GHz	3.5 GHz	3.8 GHz	9MB	65W
Core i3-8350	4/4	4.0 GHz	na	na	8MB	95W
Core i3-8100	4/4	3.6 GHz	na	na	6MB	65W

As you can see there will be be two 6 cores models with HT (12MB L3), an two without HT (9MB L3). The four core models (8MB L3) will not get hyper-threading, which confirms earlier rumors.