- Colors and Tiles (this one)
If you create a new account on your Windows 8.x, you will get the following start screen (on a 27")
First remark, it looks empty. We know the problem for a long time: this was designed for smaller form factors - Windows Phone but unfortunately we got it as-is on desktop.
Second remark, we also start to get a glimpse of the color problem with the Metro/Tile concept: It looks flashy.