Last year’s poor harvest of five commercial orders for large geostationary communications satellites proved even worse than 2017’s surprise low of just seven orders. Manufacturers continue to vie for fewer such contracts as satellite operators hold off buying new spacecraft while they wait for breakthrough advances in high-throughput technology and assess the potential of small-satellite constellations. [emphasis mine]
The highlighted text provides the explanation. The decline isn’t because the use of space for communications is going away, but because the technology is shifting from a handful of large geosynchronous satellites to many tiny low orbit constellations. What this means for the launch industry is that the smallsat rocket companies (Rocket Lab, Virgin Orbit, Vector) are in the driver’s seat, while the big rocket companies (SpaceX, Arianespace, ULA, etc) might be left holding the bag. These big rockets won’t go away either, but will become much more dependent on government contracts, either for the military or for civilian manned space.
The article provides a very detailed overview of 2018 and is definitely worth a full read.