Here is a continuation about their very ambitious plans that may or may not happen:

The new module-like cities will create a whole neighborhood in the Pacific Ocean by 2025. The residents of the city will mostly live in skyscrapers placed in the center of water lilies. The towers will be surrounded by artificially created fields and forests. Additional residential areas with prestigious mansions will be built on the shores of the artificial islands. The climate on the floating islands is promised to be good and pleasant. The modules will be drifting in the Pacific Ocean along the equator, so the average temperatures will make up 26-28 degrees above zero. Agriculture will be developing and prospering, the costs on electricity will not be that large.

Do you think anyone would be able to sustain the upkeep on such structures in an efficient way?  They have the plush islands off the coast of Dubai but even those are made of sand underneath so it may not be a complete comparison.

thanks to qz.com for the great info

thanks to jacques rougerie foundation for the great pic