As much as some of us would like to believe that there's that much demand for the OOT, it ain't so. It's something that fans and film enthusiasts really want, but the casual viewer doesn't really care about which version they're watching. The whole reason why it's taken this long to get Lucas to produce a decent transfer of it is because the demand isn't high enough that he thinks it's worth investing in. I'm sure it will happen eventually, but it's going to be a niche product, and doing it for historical preservation will have to be the motivation to do it moreso than consumer demand.