I think "Airbnb" is entering our lexicon as a verb, the audience will widen. I hear the phrase "just airbnb your place" more than "just rent out your place". When people talk about travelling, they say "we'll just find an airbnb". "Airbnb" replacing hotel/rental/motel/bed and breakfast.

Likely lots of bias here as I'm a 30 something techie person, surrounded by like minded people.