Sex tourism?
At present, sex tourism exists because these places are the only place you can do this stuff. Robots would change that. Moreover, if the first sexbots arrive in 30 years, they'll be cheap as chips in 50 and the majority of people will be able to afford one at home.
Sexbots will kill off the sex tourism industry, except for a few niches catering for those who get off on the exploitation rather than the physical act.