User blog comment:Gardimuer/BioShock Infinite Demo & Screenshots/@comment-3042051-20100924025352/@comment-939754-20100924184402

Although you must admit, it does seem apparent the buildings have dynamic movement. The part of the gameplay where DeWitt looks across the map at the cannon, you can see the buildings floating almost violently.

Also, to comment about the breaking pavement... new engine, things like destructing buildings... why not destructing pavement? It would work with the same system as Him or Handyman landing hard on it and making craters.