[ghaff]

I wish them the best but, even if they can get the technology to more or less work, the economics and regulatory environment are pretty tough.

At the end of the day, it's almost certainly going to be an expensive airline ticket and even if United was (rather inexplicably) touting Boom in their advertising, I'm not sure how many customers there are to pay out-of-pocket for supersonic flights that are likely to be a premium over current top-end seating. I'd love to zip over to Europe a lot faster from the East Coast of the US. But I'm not going to pay as much to save time as I would for the rest of my trip.