Why would a movie "ruin" the trascendental experience you had watching the show? There's zero logic to that argument. I don't think the godawful A CHORUS LINE movie "ruined" the experience of those who saw the original Broadway production, nor did the poorly received NINE movie erased people's memory of the two gorgeous productions and cast recordings that preceded it.
A SUNDAY IN THE PARK WITH GEORGE film could be truly magnificent and Jake Gyllenhaal was born to play the part. I doubt any studio would shell out money for it, but I didn't think there would ever be a movie of THE LAST 5 YEARS.
"Some people can thrive and bloom living life in a living room, that's perfect for some people of one hundred and five. But I at least gotta try, when I think of all the sights that I gotta see, all the places I gotta play, all the things that I gotta be at"