Isn't it obvious what Apple is doing? The MacBook air was always meant to be a limited yet super portable device. They are just taking it to the next level of portability, and I bet soon to follow the retina MacBook Pro slims down to about what the current MacBook air is. So if the new MacBook air is not your perfect computer, the new MacBook Pro will likely be.
Also, your signature about the new thunderbolt display, it should be obvious they can't come out until a faster thunderbolt is rolled out that supports 5k.
"It should be obvious" blah blah blah... Oh to be as wise as and knowledgeable you! That signature was there long before you or I had heard of an Apple 5K display, and there it will remain until we finally see a new one. It is getting on for four years since a Thunderbolt Display update.