The overall trend worldwide is toward higher urban density, not less. This is more so in the developing countries - it's unlikely to swing away from this. As long as population is growing, the cities tend to grow (and become more dense) with them.
That is correct in the aggregate: people are moving from sparse rural areas to denser metropolitan areas. However, the urban density of metropolitan areas themselves is decreasing in the developed world. Most of the growth occurs in relatively sparse suburbs.
