I don't really see that use case. If you're in a different city, presumably, you're there to visit something physically located in that city. If not, why travel there? So during the day there's no need for an office. You'll be visiting the factory, client site, etc. that brought you there. For the rest of the time your hotel room comes with a desk and you can work there.

Sure, there's probably some need for temporary surge office space like a insurance company setting up after a disaster. But that seems a pretty small niche to build a billion dollar business on.