they won't nix the optical as it is a MacBook Pro
That makes absolutely no sense:
It is a Macbook Pro, ergo is has an optical drive.
(Not trying to disprove this, just pointing out how absurd that sounds)
While I understand that the Opti Drive is important in a "pro" line of machines, I have a feeling that drive space is more important, leading me to believe that SSD's are not coming standard. I actually can very easily see the Opti Drive being pulled and offered separately for the 13 model, you guys can all talk about how much you do/don't use it, but fact is, physical media is slowly dying.
Now, that's not to say it won't sick around for a few more refreshes on the larger models, but with the contributions Apple has put into OpenGL and opting for "killer graphics" in the 13 with the last refresh, I don't foresee a step backward in GPU performance.
Nor do I see the 13 being dropped altogether. It seems that the 13 has actually been a fairly good seller for Apple, it's been a good way for PC users to come to the Apple mobile world with a well built/specced machine at a somewhat affordable price.
So for alternatives?
I wouldn't be surprised if AMD has been working on an integrated style GPU similar to the 320m behind the scenes for Apple. We've seen what they can do with Zactate/Ontario, why are people here so skeptical of their chips?
Stick with the SB IGP? It's possible, but it seems unlikely, same reason that they stayed with C2D last refresh, they opted for "killer graphics" which Arrendale would not provide.
Remember, these are all speculation. No one here is really qualified to say "they will or won't" do something. That said, there is too much of this going on.