I want to say AotC and RotS were still "finished" at full 2k cinema resolution. That is, the vfx and the DI were done at that resolution, even though the native footage was only 1920:817.

TPM would've almost certainly been finished that way.

If that's true, that means Lowry's 2004 work on the OT was actually slightly lower res than the prequels. I guess it was close enough to not tell the difference, since dcp's have apparently been made from it and shown theatrically.

... Or I'm just overthinking all of this.