You could be right about KOTCS, it was cut on film but they could have conformed it digitally. It surprises me that they only did it at 2K though - I dunno if that's accurate.

The CGI in Phantom Menace was probably rendered at 2K, and if I'm not mistaken the digital camera used for AOTC was 1080p and the ROTS one was 2K. I could easily be wrong about that though.

Printing a digital image to film can result in some artifacting since you're effectively upconverting the resolution (not exactly accurate, but similar concept), but if it was shot on film, you won't have that problem (usually). You should always see a film in the format it was shot in - for AOTC/ROTS, that's digital.

American "standard" widescreen is 1.85:1, European 1.66:1. "Scope" films are 2.39:1 (was 2.35:1 until 1970), though most films shown in "scope" format were shot on Super 35 instead of anamorphically (which sucks).

I thought TDK was mixed very well - sure the loud parts were loud, but that's just because the quiet parts were well-mixed at the appropriate difference of volume, meaning in order for those parts to sound natural the volume would be up loud enough to make the loud parts REALLY seem loud.