One critic at the time said this short had "Fire, splendor and tenderness." I would agree.
I think the reasons it was originally teamed with Sleeping Beauty were: 1) Both used great music, although SB's Tchaikovsky was lightened a bit. 2) Both were in multi-channel stereo, and the theaters exhibiting SB during the first several months had to be equipped for 70mm to qualify, therefore were also equipped for multi-channel stereo. SB was in Super Technirama 70 and 6 channel stereo, and Grand Canyon was in 35 mm CinemaScope and 4 channel stereo.
I think the reasons it was originally teamed with Sleeping Beauty were: 1) Both used great music, although SB's Tchaikovsky was lightened a bit. 2) Both were in multi-channel stereo, and the theaters exhibiting SB during the first several months had to be equipped for 70mm to qualify, therefore were also equipped for multi-channel stereo. SB was in Super Technirama 70 and 6 channel stereo, and Grand Canyon was in 35 mm CinemaScope and 4 channel stereo.