Altough there are some interesting choices in film making, I rather prefer to see this piece only as a "Joaquin Phoenix solo performance art". He truly is amazing and besides him, there are not much things to mention about this movie.
Shallow fan service, crossover video. Basically a cool Blizzard animation with no plot whatsoever. This could be on Youtube but hey they had to add boring, abrupt, irrational live action scenes which are trying to build a dystopia. Spielberg's name doesn't mean a thing for this movie.