The Other World Computing blog ran an experiment with the new Retina Macbook Pro:
Including the built-in Retina display, the new 2012 MacBook Pro 15″ can run four displays at their native resolution.
Moving images and media didn’t create any lag and we were able to play video on all four displays simultaneously.
- Retina on laptop @ “best for Retina”
- iMac used as a display @ 2560 x 1440 via Thunderbolt
- iMac used as a display @ 2560 x 1440 via Thunderbolt/DisplayPort
- LG monitor @ 1920 x 1200 via HDMI