It's supposed to be a satellite-based internet, in the past months Elon Musk has been sending a shit ton of satellites to provide this service... if he becomes the number one provider he will become the richest man in the world, i can see it coming. So maybe it has a free version and the paid one, isn't clear yet... But it will be something good for those poor countries who don't has internet access.
Which other Internet Provider company can boast about launching their own satellites? The constellation for Starlink is planned for 40k sats. That's A LOT. But they are the only ones with capacity to do so, because SpaceX.
The simple matter that they have cheap access to space while the others don't, is already balance breaking. But their constellation is also low altitude, which allows for those tasty 20ms pings.
On top of that, the vacuum of space lets light travel faster then fiber, so their typical example is they could achieve lower latencies from, say, New York to London then using the transoceanic fiber optic cable.
The satellites act pretty much like the cells in a cellular network, the passing sat has to share its bandwidth with all the terminals. Therefore it would result faster in isolated places with fewer people, than urban centers with millions. If a city is already well connected, you won't see any point in this. If you are rural, it is a game changer.
Some even say that this might enthuse people to go back and live in rural places now that proper internet will be available everywhere.
The technical limitation is out of the way, but the political ones... For example, China does not allow planes flying above their airspace to give wifi internet to their passengers. You can bet Starlink will be banned too. Doesn't mean if you could somehow smuggle that antenna it wouldn't work, unless Starlink (somehow) complies with Chinese authorities and turn off their sats when they fly above their land...
Poor Elon, he is going to face the dark side of humanity. So far they had good relations with Tesla, we will see.
Oh and speaking of planes, yes this is very good for moving aircraft, it has already been tested in flight and worked great.
