It would be pretty awesome.
There is an alternative explanation: the Eurocom public/social communications dude got confused by the old linkedin post that states eight cores for Cannon Lake and he doesn't know that Cannon Lake-S was cancelled.
Remember that Intel calls Z390 "Cannon Lake PCH". That could make somebody think that Z390 would still see a release of the originally planned Cannon Lake octocores, and the H2 2018 date could be just guess. This way, the much unexpected compatibility with Z390 and presumably LGA 1151 would be explained, too.
I have no idea what to believe here though. I could see how somebody could fall for this mistake (and this long in advance, the laptop maker is not allowed to talk NDA roadmap of course). But on the other hand, it is a complicated theory. Really, who knows, it might actually be Ice Lake for real.