auch in deutsch: vimeo.com/ekkescorner/cool-apps-de
A look at the design guides of Android 4 and BlackBerry 10 (Cascades) shows that the trend is towards a consistent look-and-feel, as in iOS was a success from the start.
In this session, which was on the MDC (Mobile Developer Conference) in Stuttgart presented by me, I point to the essential elements of the mobile platforms Android4 and BB10 Cascades:
UI controls, fonts, colors, icons and navigation with action bar, tabs, ContextMenu etc.
Even when comparing only these two platforms you can see how important it is to follow the platform-specific UI design guidelines because ANDROID4-Actionbar ! = Cascades-Actionbar.
This video is a brief summary of the 60-minute session of the MDC (mobile-developer-conference.de/History/MDC-2012-kompakt/Programm2/Coole-Apps-fuer-Smartphones-und-Tablets)
There is a german (vimeo.com/ekkescorner/cool-apps-de) and an english audio version.