Space Tourism
I know this has appeared before so lay off me Beags!
Richard Branson - space tourism - hotel in orbit - luxurious accommodation - superb cuisine - but no atmosphere - boom boom!
Rgds SOS
P.S. How interesting that Alan Bond's team, in the 21st century, have developed a truly earth shattering concept, which owes so much to the ideas of Max Planck published in the 19th century. The science seems to fall into the Goldilocks porridge bowl but the engineering is seriously tough.