It was only existing for certain features. 70mm film is the equivalent of 2.20:1 and has been used for 100 years. 2.35:1 scope has been around for 60 years. The 16:9 aspect ratio was created by SMPTE member Dr. Kerns H. Powers putting all the aspect ratios together and taking the interlapping parts. Regarding Toy Story 3, it is actually 1.78:1 on the disc, even though the OAR is 1.85:1. Not all theaters show 100% of an image and SMPTE practice allows for a 5% crop, recommending 3%. Cropping the width of a 1.85 movie 5% gives you an aspect ratio of 1.76:1 so 1.78 is within SMPTE standards.