Synnöve said:

I saw a fresh 70mm print of 2001 in the Seattle Cinerama last month. Two observations:

-Smilebox looks nothing like what one sees in the cinema, simply due to the differences between having the curve in the center of one's vision vs. in the peripheral.

-The color was, to my memory, close to the blu-ray (though it's hard to judge as the gamut of film is somewhat larger than REC709).

The single camera films aren't going to look quite like the three panel films though. And 2001 apparently never had prints optically "rectified" for the Cinerama screen.

http://www.widescreenmuseum.com/widescreen/wingcr6.htm

It's a Mad Mad Mad Mad World was rectified for Cinerama, and I think the optical distortion can be seen in some of the "lost" footage restored for the recent Criterion Blu Ray.