Reddkryten said:

I'm a newbie here so I could be wrong, but surely it couldn't be 4k? Or if it is 4k it would be a big deal for the original trilogy?

My understanding is that the scans of the original trilogy, were all done at 1080p, just under 2k. So if Disney have a 4k screening, they would have had to rescan the negative?

Also, werent the last two prequels shot at 2k or under, so they would be impossible.

I recall reading that the originals were scanned in 4K in 2004 (for a good master for the DVD versions), and it's those scans that we've been getting versions of/alterations of since.

Regarding the prequels, TPM was shot on film, but yeah, AOTC and ROTS are originally 1080p since they were shot digitally.