> I think Airplanes are going to be pretty profitable.
Anything at sea, too. Going on a cruise? The cruise ship can offer you Wifi backed by Starlink for another few bucks. Or even your cell provider could get you hooked right up to Starlink for some phones.
Container ships, military vessels, even fishing expeditions could enjoy an internet connection and cell service.
It's big in the recreational boating community, as those folks generally have the disposable income to support a SpaceX ISP subscription.
Worldwide there's roughly 30 million recreational boats, whereas for commercial aircraft carrying people (not cargo) is more like 30k, so different orders if magnitude. It's highly likely boating would be a more profitable industry to satisfy demand for than airlines in the long term. That is unless they're charging exorbitantly more for airline contracts than personal boat use, which is totally possible.
Container ships, military vessels, even fishing expeditions could enjoy an internet connection and cell service.