I have to say that this is one of the most confusing line ups i have seen for the Mac, i'm in the market for a new MacBook and for months i have been going backwards and forwards between the 13" Pro and the 12" MacBook, i love the design of the MacBook i think it looks great but i also want a little more power and a bigger screen, HOWEVER i don't think i need or want the power of the Pro (it would probably be wasted on me) so it is a difficult situation because normally that would leave the Air but with no retina display and having not been updated in years it would be no better (other than SSD speeds) than my current 2011 MacBook Pro that i want to replace.
IF Apple introduce a 13" MacBook or MacBook Air (name isn't really important) that has a retina display and specs that are half way between the Air and the Pro it would be the perfect MacBook for someone like me! also if they offer it in space grey (or the gold, i'm not sure) then that would be great too.