He could present a design tomorrow, and it could be a great design. It would still be a decade or two before regulators and insurance underwriters approve it for residential use.
It will need to be demonstrated as working safely for years in controlled commercial/industrial environments before it will be approved for home use.
You could be right, but the pace of technological adoption is blindingly fast today. Not every government will move at the the snail's pace of ours.
If this device is fully proven, and can be configured to power small facilities, it will happen quickly, somewhere.
Which is precisely his stated "game plan". But there are hints that the good performance of his 50 cc unit has caused him to move "home applications" up in his mental priority list. Here follows GROSS SPECULATION....the reason for that is that the small unit shows little or no tendency to "run away", as the larger units do. It actually REQUIRES the external heater to stay running.