Similar to some of the theater shows at DisneyWorld. It's cool, but doesn't add a whole lot to the experience IMO (unless they've made huge strides that I'm unaware of or something).
it looks like they actually filmed this movie with two additional cameras on the side in order to create actual footage on the walls, not just ambient light. Still, I think the addition of ambient light on the walls, ceiling, and floor can add a ton to the experience. Much like surround sound has done. The issue is having it be supportive of the actual content on screen, and not replacing it. If they start showing important stuff on the walls, people are going to miss it.