Is Taipei 101 soon to be the tallest?

Burj Dubai is a skyscraper currently under construction, since April 15, 2005. Burj Dubai will likely become the tallest building in the world after its completion on 2008. It will beat out the current title holder, Taipei 101 in Taiwan, as well as numerous other proposals including the Freedom Tower at New York City's World Trade Center, the Shanghai World Financial Center and the Fordham Spire. In addition, it will assume the title of the world's tallest structure, surpassing the tallest freestanding structure (on land), Toronto's CN Tower, as well as the guyed KVLY-TV mast in North Dakota, the latter setting a minimum height for the tower at almost 630 m.