It was a slightly nostalgic thing already, a future nostalgia. We’ll remember the things we said today, sometime in the future, so the song projects itself into the future.
And that's likely what made this song intriguing to me. It caught me as being lyrically deeper than the bubblegum pop of much of the rock music of that era. Or to sum it up succinctly, like the article says, "reverse nostalgia".