Theres no need for any film to shot using those ratios, its just silly. How many people actually pay attention to these things when their in the cinemas anyway? How many cinemas actually play them in their correct ratios?!
The Blu-ray of How the West was Won includes the standard letterbox version, plus what they call a 'smilebox' version which tries to recreate the experience of watching Cinerama in the cinema. Looks pretty silly to me.