Read the Definition. If apple made a small computer it wouldn't be a netbook it would something totally different, thats what I'm trying to say! They won't make a netbook EVER! if they want a small computer the will make one but not cheap and with more features.
Apple has been known to completely ignore established definitions when creating their products. The iPod and iPhone come to mind.
As does the MacBook Air, which doesn't seem to fit the definition of ultraportable, yet Apple and the media continue to flaunt it as such.