Check out my design of what I thought the next Windows Phone should look like
This was done way back in late 2011 or early 2012.
I was pretty close to what was released lol With the option to make the tile bigger and display e-mail body or other app relevant info etc. A long with the removal of the black space and >2 tiles in a row. The big buttons at the bottom actually hide, so it works like a charms bar where you can swipe them up.
Windows Phone 8