Personally, I don't think anything smaller than a 13" could justifiably be considered a 'Pro' laptop. Professionals usually require a decent screen size to work on and 11.6" would not be sufficient for most, if not all professionals.
Wrong. I have the Vaio SA. It does not "taper" down to the front end. It's the same 0.92" the whole way through (I don't know where you got the 0.95" and 1.3" numbers from).
[url=http://img141.imageshack.us/img141/3659/vaiosa.th.png]Image[/URL]
At any rate, Sony has proven it can be done. You can have it all - ODD, reasonably plentiful ports, good GPU, and good CPU in an acceptablely cooled 13" frame (admittedly, I do strugle to get 5 hours of office/web work out of it). Now I want to see Apple do *something* to the MBP13" line to make it worth while. Starting with a higher res display (like the MBA13), and perhaps some form of dedicated GPU.
I want a MBP13, just not how it is right now (that, and it's a heavy pig compared to the MBA13).
Personally, I don't think anything smaller than a 13" could justifiably be considered a 'Pro' laptop. Professionals usually require a decent screen size to work on and 11.6" would not be sufficient for most, if not all professionals.