Metro UI: Past, Present and Future

"...a summary of a talk the Windows Phone Design Team has given a couple times recently, on the history and the future of the Metro design language."

One of the first things that comes to mind when you pick up a Windows Phone 7 device is how simplistic yet effective Metro UI is.  Its concept of glanceable live information on clean tiles without added chrome is refreshing.  It is such a departure from every other competing OS who for the most part still use icon driven graphical user interface which apparently dates back to as early as 1945.  

The presentation by the Windows Phone Design Team details the inspirations behind Metro.  It is a good lesson in user interface design and a good primer on the origins of the modern GUI.  It also gives us a hint of how they would like to see Metro evolve.     

What do you think about Metro and how would you evolve it?