Satellite internet
Connectivity via satellite rather than cable — and a technology that only became usable once the satellites moved closer.
Classic services used geostationary satellites at 36,000 kilometres. The signal must travel there and back, giving a delay of at least half a second no matter how good the equipment. That is fine for downloads but makes video calls and gaming unusable.
Low earth orbit constellations sit a few hundred kilometres up and give latencies comparable to fixed broadband. The price is that the satellites move quickly across the sky, requiring thousands of them and terminals that track them with phased-array antennas. Astronomers have objected to the light reflections, and the sheer number of objects in low orbit has become a question of space debris.