Well, I'm not just talking about safety, but the type of reliability you need from a single boiler home product. If I were a Brillouin or [lexicon]Industrial Heat[/lexicon], I'd focus my efforts on the power generation or industrial market, which will be more forgiving of individual module reliability and is big enough to keep everyone busy for a long time.
I guess that someone will need to first have a commercial high-temp reactor before we worry about who buys them.