I am just throwing this out there as a recent user experience. Maybe it is my machine, maybe it is ALL machines... I was toying around with the MDP-HDMI out to my HDTV. Most "high def" 720p stuff worked just fine. I ran into a problem while trying to output a my 10GB 1080p BR RIP of Kill Bill tonight. I was using VLC player and it played, but the video was jittery. Frames looked like they kept freezing for a very slight second. Audio played fine and stayed in synch though. I am using a 2010 13" 1.86mhz C2D with 4gb memory. My 2007 imac has almost similar specs (slightly faster processor - but obviously worse graphics card) and plays this file without a hiccup at all. I have a 40gb Dark Knight file that plays back fine on my iMac, but have not even tried to test it on the MBA yet. Seems like I will get similar results.