Originally Posted by TheMoose
If a movie was shot on film I believe it has a high enough resolution to be transferred as 1080p.
Film stock easily exceeds the resolution of HD video. The only issue is how well the films have been preserved and how carefully they have been transfered from film to disc. Witness the debacle with the terrible transfer of The Fifth Element. The initial Bluray was a definite step down from the DVD due to poor mastering. Thankfully it was re-mastered and re-released.