Yours is the first claim I have seen that the 13 inch MBP's 1280 X 800 resolution display looks better than the MBA's 1440 X 900 display. In addition to the MBP's inferior resolution, I dislike its highly reflective glass covered screen. Although the MBA's screen is not totally immune to reflections in the way that matte screens are, it is totally non reflective under most lighting conditions. I spent about half an hour checking out the 13 inch MBP's display at the Apple Store on Monday and was underwhelmed.
All of that said, I still think the 13 inch MBP is a better choice for users who don't place a premium on thinness and lightness and can live with its, to me at least, inferior display. The MBP's RAM and storage are both user upgradeable, whereas the MBA's are not. Also, the MBP's firewire 800 and Thunderbolt ports add significant utility to it. Best of all, the entry level 13 inch MBP costs only two-thirds as much as a comparably equipped MBA -- as long as you can live with the MBP's slow mechanical hard drive.