This movie is being shown 1.85:1 everywhere so it would only be able to switch to anything taller in the IMAX theaters that can show 1.4:1. Switching to 1.9:1 wouldn't do anything.
Common complaints are that it is a shot by shot remake but without the emotion from the original. Both the facial expressions and voice acting flourishes are cut back extensively.
I was at the theater today and some little girl was pointing at the poster and said that this is the new version with real animals. I sure hope people don't think they actually have real animals in this movie.