I don't understand.
The air is faster, more reliable and lighter. It has a better battery life and a higher resolution display. External storage is cheap, and external cd drives do the job just fine. There are very few valid reasons to buy a 13" MBP
That is a strange way to view things. I doubt the dvd drive had much to do with this. For anyone that uses one even semi regularly, they are likely to go for the built in one. The only downside is that Apple uses the crappy slot loading ones. The Air has a higher resolution display, yet it's still inferior. Viewing angles and everything else are inferior. The resolution isn't much higher. Unless you compare side by side you won't notice the difference. External storage once again is one of those sticking points. You need backups. They are external, yet tying yourself to a desk too much defeats the point of a notebook.
At its current state, the 13" MBP does not have any more power. The end user experience as far as processor power is either going to be the same or lean towards the air
You really are just so far off here. You have far more after market options with the mbp as far as ssds, an that is the only thing that is faster when comparing stock configuration to stock configuration. If you're cpu bound, you might as well go to the 15". I mainly responded to argue the other side, but you really are biased on this topic. You may prefer the macbook air, and they are close enough for most people. My biggest hangup would be its display. It's not very good, and the extra resolution doesn't make up for it.