Are people born in a particular generation good judges of which artworks of their own era will stand the test of time?

I am moved to ask this by a disagreement with a member of an older generation as to what songs are quality, lasting songs.

I wonder, if a song comes out, or a movie premiers during your youth, and you attach memories to it, do you inflate it’s value?

Later, when discussing this period of history with people who are younger, will you cite this song, book, or movie as more important to history than it is in actuality? Are you biased to cultural impact?