The idea that the whole scene blends seamlessly is very interesting. Giving the illusion that the whole animation would be one sequence rather than separate would be quite crucial.
Horizon is an amazing example of how projection mapping can give an impression of depth and scale. This should be used in the final animation, but this a cool use of this technique nonetheless.
Hors Champ uses colour and screen effects very effectively to give a sense of realism and believability, despite the art style of the animation.
The animation in Coil is very well done, some scenes use a large amount of animation, whilst some areas only need a small amount, but it's enough to emphasise an emotion.