I think this is an exciting advancement and hope it ends up being feasible for GOS.
Now that the beta is live, I did a quick look around, and here's a few items that caught my attention:
(1) System uses unmodified cell phones. Starlink is essentially putting cell towers with large, high gain antennae in space. (Download data sheet here: https://www.starlink.com/business/direct-to-cell )
(2) Beta limited to certain Samsung Galaxy models so far. Users report sending SMS and MMS only, no RCS (because that would be data, and data isn't planned until later this year, followed sometime later by voice).
(3) I read somewhere (I think it was a post on X/Twitter) a comment by Elon saying that regular Starlink wouldn't be coming to passenger cars due to antennae size. This hybrid cellular approach circumvents that issue. (I suspect that lower data speeds would be part of the tradeoff, but I didn't read that anywhere and nothing is live, yet.)
(4) Once data is live, it seems possible that one could buy a T-Mobile hotspot to access this service as a bridge until better options emerge.
All in all, it's pretty amazing tech