Funny thread. I'd say it might show us that the OP needs validation, or is still in teenage mode of thinking a gadget makes him/her more "cool" somehow. :-/
They're different machines, and different purposes.
The MBA form factor is cool, but the only real comparison is to the 13" MBP; the others simply blow away the Air entirely on everything. That doesn't mean the Air is worthless, but it has limitations vs ALL of the Pros - RAM, storage, lack of ethernet (please let's not compare a multi-system network on a single wireless channel vs switched Gigabit ethernet - the instant more than a single user exists, or NAS or media servers are introduced along with backups, major fail), lack of front row/remote support for those that use it (I don't, but some do). The only real comparison point is with the 13" MBP. Until the MBP is refreshed at least, the CPU power difference is pretty much equal. RAM, firewire, ethernet, optical drive, max storage space is not.
Some of those are down to individuals, as well as people thinking they need more than they actually do. Some people buying Pros might not really need 8GB of RAM, or 1TB of storage. Others may have a media server or NAS and rarely need large local storage, and may not have any firewire devices, nor use Gigabit ethernet even though it's vastly superior to wireless. In those cases, it's a tough call, and the Air might be a better deal. For someone with a desktop system at home, so for only casual or travel use, the Air might be a great deal. The Air would make a great second computer, or an occasional travel computer, or for those whose focus is more on document creation, lighter development tasks (meaning no virtual machines, let alone multiple), perhaps photo editing but not large numbers or amount of video editing, etc. The Air would be great for most students, unless they have a 500GB+ music and/or movie collection not on a NAS or in the could. The Air would be great for my Mom, and even overkill for some casual email/web/chat/skype focused users.
Where it starts to lack is for those that are doing specific types of professional work day in and day out. Now, if the Air had a maximum RAM of 8GB, and a Thunderbolt breakout box to include gig ethernet - it would really narrow the gap with the 13" Pro, so much that I would have considered one - 256GB SSD, 8GB RAM, and Gig ethernet - would have me considering one vs my 2011 quad core MBP, as it would still be less CPU power overall, but the SNB chips are really quite competent, and I could for the most part cope with a dual core vs quad core, if it had everything else and was at a significant savings, for ME. Certainly that would put it a LOT closer to the 13" Pro, neither having discrete graphics cards.
As it is now, for the Air vs the 13" Pro, it's form factor/weight, Apple SSD and slightly higher resolution (which is indeed needed on the 13" Pro, IMO), against much more storage, more RAM, optical drive, ethernet, firewire - that tradeoff is worth it for some, or not even a tradeoff at all for some, in favor of the Air, while for some professionals the Air is a non-starter. The Air in it's current incarnation is close to something I could use day in and out as a primary system, but not there yet, so it remains an iPad with a keyboard - a neat toy or second/third system, but not one that can replace my daily system I use for work.
What will be interesting to see is the next 1-2 generations of Pros and the Air. It's not impossible that all of the Pros start going the way of the Air, although if they remove some capabilities it's going to upset a lot of Pro users, and it's also a possibility of seeing the Air next gen or two replace the 13" Pro. Right now, it's not there yet for those who have decided they can cope with the smaller screen/res of the 13" Pro (maybe mostly using an external monitor), but need the extra RAM and storage, gig ethernet, etc.