For a complete digital restoration, I only currently own Pinocchio... which, like Snow White, is shown in 4:3 and not 16:9. However, to do this, the film would have to be cropped, and therefore would be missing the top and bottom of the image throughout. DVD copies aren't widescreen, just a stretched 4:3 image done by your TV. Bluray discs have the ability to adjust the image for you.
Think about it... you're expecting people to create work for widescreen from 75-80 years ago? Be realistic.
As for Snow White, this is a bluray I was at first skeptical about. However, after seeing the work and effort put into Pinocchio and it's features... I shall be purchasing this as soon as possible.
An era when Disney were still keeping the Magic alive, instead of relying on Pixar to do this for them.