Constant disruptions and noise reduce the productivity for many people.  Some types of workers will thrive in this ever changing environment and others will go on stress leave or be fired, unable to cope with the lack of personal space and quiet.   Some types of work just do not lend themselves to a hotel-style workspace.  People who write code, do research or do analysis need a more consistent and quiet workspace.   While team meeting space is important and is at a premium in more traditional workspaces, the cubicles have some fans still.