If there's a common point that links all 3 of these short movies, it's how they show human stupidity and the realistic statement that that's the reason why we are coming to our own end.
The first movie present us with a zombie scenario, more credible than those created by other movies. It's a superb critic of a society drowned in consumerism, the abuse of other life forms and the worshipping of the shallow. It also presents us with the hypocrisy people live by, with somehow subtle imagery of religion and the disregard for those same values when it comes to feeling pleasure through the material and sex. The point of view is original, for which we see the event unfold mostly from the perspective of a zombie, rather than a hero trying to save him/herself. The film is filled with humour, although an underlying seriousness is palpable.
The second movie is a completely different story. It's comparable to Ghost in the Shell for its cyberpunk elements as well as deep philosophy. There's no comedy here. It's the only film with no direct doomsday scenario, although the human folly is obviously present. The future presented here is most plausible and, indeed, this is likely to happen sooner or later. This film is worth watching on its own, if you want to skip the other 2.
The last film is pure absurd comedy. I personally didn't find it amusing, particularly after watching the previous one. The nonsensical idea of this movie is not helped by the fact that the plot wasn't really thought throughly, and not much effort was put into giving any sense to anything, even to the parts that supposedly help the movie unfolds (i.e.: they randomly find silly solutions out of nowhere, comparable to the "deus ex machina" a child playing with toys would create).
Alas, I'd give individual scores as follows: First movie 5/10 Second one 7/10 Final movie 2/10
