If they can succeed with a supersonic biz jet, then it's a possibility for pax airliners. An SST renaissance depends on both noise reduction and regulatory cooperation, as the video pointed out. The new technology (developed by private and government research) looks to be pretty good, but public opinion and politics will get a vote too before it's all said and done.

But for high-end biz jets it just has to be safe, reliable, and slightly cheaper to acquire and operate than the space shuttle.

An airliner will have higher economic hurdles... the vast majority of people who can afford to spend tens of thousands of dollars to save a few hours already fly private anyway. But if they can get operating costs and ticket prices down to a reasonable level, then of course there would be opportunity... maybe even lure some premium pax back from private aviation.

Also climate optics carry a lot more weight for regulators and operators of very public and visible airline aircraft. Easier to get away with gas guzzling for a few private jets (especially since the climate elite will own or fly on them anyway).

Boom is biting off a big chunk IMO, but if the other two pave the regulatory path with bizjets that could set them up for future growth (with low-boom modifications).