Snow White redo looked great! It made me try to think of what rides haven't seen physical or effects upgrades in the last decade...
Snow White, Alice, Haunted Mansion, BTMR, Indiana Jones, Sleeping Beauty, Matterhorn, Jungle Cruise, Pirates, Peter Pan, and Splash all have or will have gotten some form of projection mapping or major physical changes. Storybook Land River Boats got new Frozen miniatures (and new ones could always come with new films). Autopia changed its sponsor and added some figures along the road. Small World added the Disney figures. Then there's the beautiful improvements around the Rivers of America...
That leaves Mr. Toad, Pinocchio, Tarzan's Treehouse, Buzz Lightyear, Pooh, Space Mountain, and Roger Rabbit as rides that could see small enhancements ala Snow White, Alice, and Matterhorn in the future. Space Mountain. The Fantasyland style dark rides should be a shoo-in for enhancements over the next few years (especially Toad). Not sure what they could do for Tarzan given the location. Buzz and Space Mountain are perfect in my eyes, though new effects would be nice. Of course, Tomorrowland as a whole needs more love.
Otherwise, besides the terrible new Club 33 layout, Disney has done a pretty excellent job keeping rides and areas around the park updated, especially considering how many there are.