1. Satellites are too far to fight anything on ground (Power per unit area (i.e., intensity) decreases as the square of the distance)
2. If the Satellites are relaying to things on the ground, they are also relaying their location (easy adversarial targets)
3. In a war (they mention Ukraine in the article), first thing that is toast is these satellites.
I don't think this is the right replacement for GPS. Perhaps someone here can correct me if I am wrong?