Tallest Building in the World?

'The structural engineers at Hyder Consulting have announced that they are planning what will be, by an overwhelming margin, the world's tallest skyscraper, coming in at double the height of the Burj Dubai – or very nearly one vertical mile. The firm has "confirmed that the tower would be located in the Middle East region," we're told, "but would not give any further details." Here's an altered BBC diagram about the world's tallest buildings to give you a sense of what this might mean, size-wise. Note the comparative size of the Empire State Building.' via bldgblog & dvice.

'Standing over 5,000 feet, the proposed MILE tower in Jeddah City Saudi Arabia could someday claim the coveted title of world's tallest building. Although technically we can build as high as we want, other variables prevent skyscrapers from every going this tall. Issues like transport, safety, and evacuation.
Still this is chump change compared to Japan's proposed XSEED below. via electro-plankton