Apart from IMAX/70mm film sources...it is satisfying to watch a movie on a 4K HDR TV and know that you’re getting almost all (if not all) the visual information the director captured on the medium. Assuming the transfer was handled well (which most are).

Seeing the film grain detail on older movies is strangely satisfying to me. Even newer movies shot digitally are done so at 2K or 4K.