You can now, yes, of course.

Tron '82 made its blu-Ray debut day and date with Legacy.

Dare I get my hopes up for a surprise OOT blu-Ray next Spring to coincide with TFA?

In response to the original question, I just think an upscaled GOUT - though it would have color and contrast closer to the original look - would have nowhere near the actual detail of the 2011 blu-Ray. Even excessively DNR'd blu-rays would still have more detail than an upscaled GOUT. For that reason alone, it's not surprising that the people in charge haven't repackaged it in any form with the 2011 transfers.

They're not interested in consolation prizes. I agree with the theory that Disney is simply driving up demand for a restoration by withholding the unaltered versions.

At least, that's what I hope is going on.