Buddy of mine works for a company that makes gravel frames, and he's been hinting about 1x12 coming for that market.
Granted, where I live we have wayyyyy more gravel riders than road riders, so it may just be that the fast, cool local guys are interested in jumping on the hot new thing. I doubt 1x12 will be showing up on your local road group ride anytime soon.
But who knows?