I really like the whole "mini shows at school" thing: I don't know why, but I've always thought that, were Cam to retire, he would start doing things like that, in schools, youth centers and the likes!
The last sentence was almost heartbreaking, both in lieu of how the series ended, with the boys seprated, and on apparent opposite sides (I'm quite sure there was a loot of pain on Johnny's eyes in his last scene, as he was breaking everyone's heart because he had to see things through and not because he wanted to turn his back on them) and because, growing up, as inseparable as they had always been, there has always been something coming between them, keeping the twin separated, metaphorically if not physically.

Great story, love it!