I think this might be the new go-to article when it's suggested that an OT blu-ray is anything but reasonable. Look at the effort Fox has made for OKLAHOMA. Star Wars doesn't need this level of work and I will go out on a limb and suggest it would sell more copies.
http://www.studiodaily.com/2014/05/restoring-70mm-movie-musical-oklahoma-for-a-new-dcp-at-30fps/?hq_e=el&hq_m=2878045&hq_l=26&hq_v=d625a6b6ee