For all the programmers out there needing extra desktop real estate. This past week I purchased a Seiki for my MacBook Pro Retina. Just for fun I connected the monitor to my 2012 MacBook Air and to my surprise found out that the MBA supports an external resolution of 3840x2160. I was amazed ! All the documentation that I've seen only says it only supports 2560x1440 externally (like Apple's website). It was so awesome that an early 2012 Macbook Air supports 4k resolutions. Apple has yet again surpassed my expectations. http://i.imgur.com/gUxRpAs.jpg http://i.imgur.com/hz0C5kN.jpg http://i.imgur.com/wfdHz2X.jpg http://i.imgur.com/9Qznlmp.jpg One additional note, the refresh rate is capped at 30hz so it isn't might meant for gaming. But if you were wondering about videos, youtube and 1080 video looks great and there were no stuttering during playback. Hope this info helps out the people that are thinking about moving to 4k. I wanted to share this info because the impression I got from the web was that you needed a Macbook Pro Retina to run at 4k, which isn't true. A MacBook Air, the correct cable and a 4k monitor is all that is needed to run at 3840x2160.