[Predator]

Allah's messenger Prophet Muhammad (PBUH) said "The Hour will not be established-till the people of the desert compete with one another in constructing high buildings.(Bukhari)

They have already competed in constructing burj dubai and kingdom tower

http://www.smartplanet.com/blog/thinking-tech/worlds-tallest-building-is-high-tech/8042

 

[Jedi_Mindset]

Doesn't have to be extremely high buildings like burj dubai, also the other ''smaller'' ones. But as we see, when a end time sign has passed it can only become more worse.