This is the wallpaper, watch the trailer here:
In some big metropoles covered by a big dome, the poor people are turned into robots, removing them of all humanity, workers of the exploitation of the last resources of a barren earth turned into a big desert. The few people that can escape of this cruel destination take refuge in small cities out of the dome, surrounded of desert and pollution. For surprise of the members, of one of these cities take refuge, find a robot in the desert, the 4232, that on the contrary of all the other people turned into robot preserve his consciousness and account that escape of the city. The inhabitants of this city see it like the possibility to go back to the consciousness to his familiar and fellow robotizados, so that it tries averiguar by that this seems to be the only robot that conserves something of humanity...