Storage especially. Lets face it if we don't get better CPU performance out of the SB machines then Apple has screwed up. Storage is s tougher nut to crack. Then again a 15" AIR would have plenty of room for more blade SSD's.
The only way that I can see Apple dealing with this is to added a second or maybe even a third SSD slot. It is a real problem on a thin AIR type machine.
As to crappy resolution the MBPs aren't that bad. In fact I'm wondering what you are talking about.
You do realize that some people don't really like the AIR screens. Or maybe to be more specific the almost half scale size of the image on screen. This is another reason why I don't ever expect Apple to consolidate their portable lineup into a limited number of machines as some argue. The simple fact is different people have different needs.