Since the G4 days it seems like Apple have been looking for ways to separate the ibook/Macbook from the MBP/PB - when component prices come down I suspect MBA is the beginning of how they're going to do that. Once flash, OLED etc are cheap enough, Macbook gets phased out, MBA *maybe* gets a couple more ports, slightly more grunt, and then takes the Macbook's (affordable) place in the line-up.
People are always saying Apple "don't waste time on niche products!" when people suggest a mid-tower or tablet.. I think more accurate: Apple would rather not make niche products. They'll tout this as an expensive luxury, its price will drop (like the iPhone).. And it won't stay so niche. They likely want this to be huge but the market isn't necessarily ready for it yet. :/
Anyway - then there would be a much more significant gap between the Macbook and Pro, and you'd need a Pro to do anything even remotely, well.. Pro.. Because of the ports/inputs etc. Macbook (Air for now) will be enough for internet, light use, extreme portability etc.
People are always saying Apple "don't waste time on niche products!" when people suggest a mid-tower or tablet.. I think more accurate: Apple would rather not make niche products. They'll tout this as an expensive luxury, its price will drop (like the iPhone).. And it won't stay so niche. They likely want this to be huge but the market isn't necessarily ready for it yet. :/
Anyway - then there would be a much more significant gap between the Macbook and Pro, and you'd need a Pro to do anything even remotely, well.. Pro.. Because of the ports/inputs etc. Macbook (Air for now) will be enough for internet, light use, extreme portability etc.