I am unclear on why not, exactly? 4-5 years before it appears, with the obvious possibility that it never does for regulatory reasons, technology reasons....
At this point I wouldn't call it vaporware, its not that far along.
It is still a fantasy. A nice fantasy. I loved the idea. but, for now, just a fantasy.
Check back in 4-5 years (or 5-10 years?) when something has actually been delivered to the market, and lets have a glass of whiskey and be amazed at the futuristic technology.