Busan Lotte Tower in Busan (Pusan), South Korea . The building is designed to be 107 stories tall, and if completed could be even taller (including its spire and such) than the Burj Dubai in the United Arab Emirates, or its sister tower the Lotte Super Tower in Seoul, which is also pictured on this poster.
The poster shows how the building rising behind the wall will compare to the world's tallest buildings. Starting with Taipei 101, and then right next to it -- Chicago's Sears (Willis) Tower which is rightfully depicted as taller. Unfortunately, when we were there last month, construction had stopped. Estimated completion date is 2015, so there's still plenty of time to get things moving again.
Another Chicago link -- both the Busan Lotte Tower and the Lotte Super Tower were designed by Chicago's own Skidmore, Owings, and Merrill .