The retina MBA is not going to happen because there is not enough place for a large battery pack within the chassis of the current MBA. They either need to make the dimensions larger to accomodate the larger battery but that will put it in the MBP territory. Or they will have to give consumers 1-2 hours of battery life, which they also won't do because of their high level of standards. So I am going to guess that Apple is going to use ARM in the future for their MBA lineup. Also they are going to port OS X for ARM. Current ARM processors are already powerful enough for most consumer tasks. The ipad3 uses an extremely powerful ARM processor which handles the retina display with ease. Give it a few years and you have processors that as powerful as the current gen intel processor with virtually no power consumption. You guys can dig this thread up in 2014. I just wanted to say it out first before somebody else steals my idea.