Streaming content over the internet is certainly the current and increasing trend. One problem with this for use in travel trailers is that if you think over-the-air TV stations are few and hard to get in remote camping locations, wait until you try mobile network access!
If you have multi-megabit per second mobile speeds (and a suitable rate plan) that's great, but at a campsite in the Alberta mountains or interior B.C. where there are no TV stations, there may not be a mobile network at all, let alone one that supports enjoyable video streaming.
Having both over-the-air broadcast TV reception and internet streaming seems desirable for those wanting to watch TV. Satellite TV is also an option (albeit a heavy, bulky, and expensive one), but even that doesn't work everywhere.