At this point in the game, I'm expecting battery life to become the primary point of the Air, rather than weight and size alone.

Many people don't need all the high-end specs of the Pro, but they definitely want battery life.

I'm anticipating that the future of the MBA line either includes a shift to Intel Atom processors or a line of Apple ARM chips.

If they go with ARM, my gut tells me that they will either run iOS on these new MBAs or a version of OS X that only runs apps sold via the App Store. That's why I'm guessing they'll go with Atom (or whatever Intel is offering at the power-sipping end).