Post #703193

I think the previously stated reason was that the Blu-ray doesn't really have more than 720p in detail (even though it's 1080p, the film transfer isn't so great), so there's not much point in 1080p until some source better than the Blu-ray becomes available.  Not that it couldn't be done--it's just a lot more time and a lot larger file sizes for something that, for the most part, won't be noticeably better even in the 100% BD-sourced scenes.  Cue shot of Tarkin at 720p and 1080p...