AHAHAHAHAHAHA!! I think they just wanted to remind us that it could have been oh so much worse. But honestly, after the FFH end credit scene, I am absolutely convinced that Old!Steve was a Skrull now. And after Chris Evans' question about 'what did Steve do after his dance with Peggy', I'm convinced that Chris chooses to believe Steve is still out there doing 'something' that Bucky knows about, but just can't help him with right now, but that Steve has every intention to come back and not as an old dude on a bench.
I've also come to the conclusion that Captain America: The Winter Soldier was a beautiful and extraordinary movie, and also a complete fluke.