From CNN.com: Debt-hit Dubai opens world’s tallest tower
The telescopic shape is also presents problems of a more practical nature Krane says.
“The upper 30 or 40 floors are so tiny that they’re useless, so they can’t use them for anything else apart from storage. They’ve built a small, not so useful storage warehouse half a mile in the sky,” he said.
The size difference between the Burj Dubai Skyscraper and the next tallest building in the world is stunning. It’s an amazing architectural and technical accomplishment and with the current economic climate and the tremendous building costs, it seems unlikely that the Burj Dubai will be topped any time in the foreseeable future.
UPDATE: Video from the top of the spire!