I just can't see the MacBook's going! They're what started the modern Mac notebook lineup
You can sort of see how Apple sees it's own computer lineup by going to apple.com/mac
and looking at the order they line the computer up. It's no accident that the macbook air and iMac are the ones in the center, those are the machines Apple really wants to sell. Going out one further and you see the mini and mbp, while not Apple's darlings, they sell relatively well so Apple put them next. Then on the very edges of the lineup you see the macbook and mac pro. These are the machines Apple is only carrying because it doesn't want to totally abandon their respective market segments. These are the computers that sell the least and go the longest amount of time between updates.....