It appears Windows Blue will be better suited for desktop PC's, as the recent Windows Blue leak has revealed changes to the core that allows for 3 or 4 apps to be snapped on screen at one time, as well as 2 or more metro apps running across multiple screens! This is a feature many have been waiting for.
These changes, along with many more for Windows Blue are still in development, which means they are absolutely full of bugs. Other changes include more tile sizes, a wider variety of colours, and a dedicated mode which allows you to move, pin and unpin multiple apps at one time.
We hope Windows Blue will include many more awesome features for the desktop, but in the mean time, stay locked in at WinBeta.org!