bc i dont think those specs include the display out port, reason being i see ALOT of people who use a monitor for their macbook and the res looks way higher then 1152
spoke too soon:
Dual display and video mirroring: Simultaneously supports full native resolution on the built-in display and up to 2560 by 1600 pixels on an external display, both at millions of colors
so this means just using the cable from the new monitor would be fine? dont need any sort of dual setup?