Uh... All you who are asking for more out of the Air, why don't you just buy the 13" Pro, then?
Adding half a pound to the Air brings you to only 1 lb short of the 13" Pro. Remember when the Air launched, and it only had Intel GMA graphics? It wasn't meant to be a Pro! It was meant to be a non-Pro, stripped of everything they could strip it of, and made as light as possible.
Personally, I have no problem with the Air having Intel graphics. The current Intel graphics are way better than the GMA 950 that was in the original Air; they can do on-GPU video decoding, including H.264. Yeah, they won't do any heavy gaming, or even major things like GPU encoding, but that's not the point of the Air! If they bulk up the Air, all you have is a slightly cut down 13" MBP. Which doesn't make much sense. The Air is clearly delineated from both the MB and the Pro. If Apple is going to keep the Air, then it has to STAY delineated.
Even if it means the Air has an ULV processor, and Intel graphics. The chips I mentioned in my guesstimate are still faster than the CPU in the Air now, for 99% of tasks. Yes, GPU power would drop, but, again, not for what the Air is meant for. I think Apple's decision *NOT* to use an ULV processor in the Air from the start was a problem. They claimed to make a 'no compromises' ultra-light, but now they've gotten people used to getting a lighter MBP, when that obviously wasn't the design intent. They made a 'fewer compromises than everyone else' ultra-light, but convinced everyone it was a 'no-compromises'. So then people complained about the compromises that were made.
If a ULV+Intel graphics Air isn't what you want, then don't buy it. There is a market for it, though. (Especially if they cut the size down even more, so that it is only as wide as the keyboard requires it to be .)