I'm pretty sure they've already explicitly stated that Zen 2 will be commercial/enterprise first? Don't forget that -
AFAIK, at least - EPYC isn't getting a 12nm refresh. We had new consumer CPUs from AMD less than 6 months ago, and that generation still hasn't been full released (we're still waiting on the 2500X and 2300X). They're not going to start announcing 7nm consumer CPUs while the 12nm ones are still relatively new...!
It makes less sense on the consumer side where we've had Polaris, a very limited push of Vega, then nothing. Then again, Polaris released slightly behind ... erm, was GeForce 10 Pascal? ... and we've not had the next gen cards from NVidia yet, so perhaps it's not that surprising that we've not heard much about AMD's GPUs...