Contemplating this setup and curious to know if anyone with similar setup can describe how the Air manages the desktop space when using the 27 thunderbolt display versus the Air's 13" or 11" screen? Picturing this setup with the 27" TB display as my main work mode most of the time, and I can see arranging the desktop for that resolution. So what happens when you unplug the thunderbolt and use the air alone? Is the arrangement of the desktop the same, just at a smaller resolution? Or does it move icons around?