Well, since AT&T bought DirecTV and started DirectTV Now and is now buying Time-Warner, they aren't really a satellite company anymore anyway (Dish still is, though they also have Sling). But sure, its value as a loss-leader for subscribers has got to be greatly diminished.
In any case, if they keep the rights now it will presumably be on a much different scale. I'm sure the last thing AT&T would want is to retain exclusive satellite rights but not streaming (unless they could have cable too).
I kind of think the whole package has lost its appeal, more and more games are national now, and as a result the second Sunday window also doesn't have that many. The NFL is not my thing but it has never been worth it to me just to see five or six Eagles games I might not otherwise get. Streaming would make a la carte easy, whether it was per game or per Sunday.