I see a double edged sword here. We already have enough light pollution that stars are hard to see in most cities. That amount of pollution grows yearly as cost per lumen drops. The problem ground based astronomers are having is the pollution these low earth sats are having. This is the down side. What makes me hopeful is how much better orbital optics can be. Couple this with signal processing and scores of telescopes in orbit, and you could create a virtual lens many times larger and clearer than anything planet side.
As the price for getting satellites into orbit drops I imagine astronomy having some pretty major breakthroughs.
That’s at least my hope. Most of what I’ve been watching is low orbit satellites but I don’t know how high an orbit you’d want for the kinds of things I’m imagining.