My immediate thought afterward is how is the Doctor going to explain this to Rory's Dad... And what of Amy's family?
Yeah, I had the same thought, and I was hoping we'd get to see some of that.
One thought that does occur to me, though, is that River still needs to write that book and give it to Amy to publish. In theory, at least, even if the Doctor never sees the Ponds again, River still will.
The unfortunate thing now is that the Doctor has no idea where Amy and Rory are. There's nothing to say that their older selves won't try and track him down at some point. We don't know how old Amy was when she wrote the Afterward; for all we know the Doctor pops up just as she finishes it.