Interesting, I think you are partly right. Maybe when Ron saw himself in the mirror with all that glory he felt noticed, appriciatied*or however you spell that word*and he kind of kept in the back of his mind. Basically what you said. I wonder if JK is aware of the things she's made us think so much about. If she did it on purpose or if were just to smart for her? To many gaps.
I'm almost positive that Harry will see his parents again. If Harry's to die in book 7 then surely he will see at least the figure of his parents.