What you’re suggesting about “super-premium” flights doesn’t map to what’s being publicly said about Boom or the fundamental principles of commercial flying. As a matter of fact, the Concorde ultimately failed for those very same niche-economy reasons.
What’s your source for saying that business trips flying coach will diminish?
That's an unsourced opinion based on personal experience. Zoom has become a much more common method of connecting with remote teams. I don't see a compelling reason to travel for non-critical business functions, and if the travel is that business critical then I can probably get my company to pay the expense of a premium ticket.
There are probably 2 travel occasions per year where the business travel is more of a "fun" activity such as conferences etc. I'll still fly coach for those.
Also the Concorde was not that much of a premium over first class on, say, a 747. I'm remembering +30% or +50%. Of course, that first class ticket was very expensive if you inflate it to today's money.
Even a month away I can't see a direct flight for less than $8k return leaving JFK evening of Jul 11th and returning July 16th.
The flights are pretty much empty at the moment, but they would be at any price. Doesn't mean that VS/DL will sell for $7k (undercutting BA/AA's $8k), it's effectively a cartel.
The Concorde was a premium over sub-sonic first class but it wasn't anything like double.