Within "Celebration Day" is such a clear way to tell the story of the band. Blending modern, high-definition widescreen footage with old and rough stock — the past and the future meet in this strange intersection. A place that exists beyond time. The band is old (JPJ has wrinkled, the drugs show on Page, and Plant's voice has sunken — not to mention the songs are all brought down), but the band is young (on the drums, Jason Bonham — the son of Bonzo). The audience is geezers and kids alike. Everyone coming to see the blimp come in for one last time.
If "The Song Remains the Same" emphasizes the sexual, almost ethereal appeal of the group. "Celebration Day" is the fulfillment of some promise that the life remains even after all this time. The band has changed, but the music remains. The music is timeless, the music is eternal.
The song has, in fact, remained the same.