Will Apple replace the Macbook line with Macbook Airs?

Just wondering who else agrees with me that the Macbook line will eventually be replaced in the next couple years by the Macbook Airs. I'm sure the prices are going to come down as the number of Airs sold (already quite popular) increase. Eventually the price gap would no longer perhaps be significant and mobility with sufficient power be easily achieved by the Macbook Air along with its light weight, fantastic startup times and battery life. So, are we looking at a future with Macbook Airs for normal computing (browsing, doc creation etc) while Macbook Pros will remain the domain of power users? I think so.

Who else does?