AFAIK at least in Europe we are exactly in the process of moving ADS-B receivers in satellites in a large scale fashion to replace the current system based on g

AFAIK at least in Europe we are exactly in the process of moving ADS-B receivers in satellites in a large scale fashion to replace the current system based on ground units. I was talking with a control tower worker a few days ago and this is what he said, additionally a few months ago as the author of dump1090 I was approached by the company he mentioned that tried to hire me. So it looks like it's true.