I don't know if they meant to use this as a chance to leave the story open-ended for a continuation or not, but it happened far too late into the story to matter, and everything was only brought back to the status quo by the time the series ended.
Haruhi has recognized that it was him, but he doesn't seem to recall the incident.
Here these same situations are used for nothing more than cheap laughs and with little to no romantic progression.
Kyon misinterprets the gift as more courtesy chocolate, so Yuki then attempts to confess her love, but is interrupted by Tsuruya.
Noticing her new interest in reading, Kyon takes Yuki to a library.
Guess who knows about it? The animation, I admit, is not as good as in the original series.