Why doesn't Apple just design a main processor board the size of a MBAir. give you the I5 or I7 and then release MB pro, MINI, IMAC and MBair all at the same time. Same spec just get to choose how big the Macbook or the IMAC is. They can spice it up with different video cards and memory and screens. Solid design, fast & cheap manufacturing. Refresh every year. Versus he dribble out all through the year. Plus it cuts the engineering dept. Oh and the extra space on the large MBP vs a MBAir, fill that up with batteries, usb port, remotes whatever.