It just amazes me seeing people say that OOT should be restored. I takes just a little computer knowledge to see that it is already restored. When they digitalised and cleaned the film stock for the purpose of 1997 SE (which in average yields higher resolution than 1080p Blu-Ray), they without doubt first copied that data of hi-res digitalised theatrical version on at least several hard disks before started altering one of the copies. When they applied the changes for the 1997 SE, then they actually reduced the size/resolution to fit Laserdisc.

If you ask me, the theatrical versions are already digitalised and cleaned up somewhere in LucasFilm archives. That is unless Lucas specifically ordered to destroy the source data.