Not being too familiar with the intricacies of Naruto's supporting cast, I'm going to just speculate here that this coming-of-age confrontation is a milestone in Tenten and Neji's relationship that they will remember for the rest of their days. They will just be a couple of old and wizened ninja sitting on a porch somewhere, sipping green tea and remembering. Neither of them will not be there, as that would be silly.
Man, look at all those trigrams Neji is pumping out there. I bet he never stops doing that.