I think the only way one of these 'all the frills' services could work long term would be if they could reduce the flight time. As previously stated, it's just as easy to get a business or first service on a regular carrier so you need something particularly unique to make it work. In other words another Concorde. Concorde worked for people who's time was literally cost money. Although, it would still be significantly challenging to make a supersonic operation break even to say the least.