Nope, AotC and RotS were filmed with 16:9 1080p cameras and then cropped to 2.35:1 (so the resolution of the original live-action footage would actually be 1920:817, just like any other 2.35:1 movie when viewed on blu-ray). I'm pretty sure that the effects were done at 2K though, so 2K would be the resolution of the final master if I'm not mistaken.

The '04 SE is a different story. It's currently stuck at 1080p. I would hope that if Lucas ever decides to release them theatrically he'll remaster them at 2K. A 2.35:1 movie from a 1080p master wouldn't look too good projected up on a movie theater screen.