Flexibly configurable button panels for electronic devices and dynamic display systems for wager based gaming machines are disclosed. Button panels include a flexible cable, surface mount or other cable connectors spaced along and coupled thereto, and button assemblies coupled thereto via the cable connectors to provide electrical access from buttons to circuit lines. Relative physical locations of buttons are then reconfigurable to form different button panel configurations while the buttons remain coupled to the flexible cable. A dedicated dynamic button panel controller for processing button functions and a button panel identification device having an identification code can also be provided. Buttons can be removably coupled to the cable connectors, and can also include dynamic displays thereupon. Other gaming machine dynamic displays can also be provided. Separate dynamic display controllers can be provided to control dynamic displays directly to alleviate processing burdens on the master gaming controller.