You are confirming what the OP said - that future MBPs are likely to be more MBA-like than not, as Apple feel that the form factor is the future of notebooks.
No, that is NOT what Apple said. Stop misreading things. You're leaping to conclusions based on an iffy statement. This is the problem with Apple and their fans - you hinge on every single damn word they say even if the words are said in passing (which is why they don't do press releases of new upcoming things, because they know you people do that crap). You also take released products as an indicator of things to come JUST because of the MacBook's evolution. STOP DOING THAT.
If Barack Obama said "you know, I think we're seeing the possible future of travel, with high speed rail" - oh wait, he DID say that. Guess what? It'll never happen in the US.
Just because someone says they think something is the future, doesn't mean it is. Nor is it definitive confirmation that anything is going to change with respect to any given product.
People are pissy about the MBA and backlighting - why? Because the previous revision had backlighting so people ASSUME every MacBook should have it and get pissy when one comes out that doesn't.
People are pissy about the iPod Nano - why? Because the previous revision had physical keys AND the screen so people ASSUME that every new Nano should add more and not take away.
People are pissy about the Ipad 2 - why? Because of some off-the-wall rumor that it would have a USB 2.0 port. Came out of someone's rear end yet people are hell-to-fire about it not being there.
If you people want your slim machine buy the Air. If you want a power machine buy the Pro. The Pro's thickness is pushing it for a machine with as much horsepower as it has. Can you imagine having a quad core i7 in a machine with NO ventilation like the Air? Makes no sense. People have reported temperatures pushing degrees Celsius and that's with chassis room to breathe. Putting that kind of power in the Air is asking for a McDonalds Hot Coffee-ish lawsuit.
I'm waiting for a DEFINITIVE STATEMENT of Steve Jobs or another authorized Apple representative saying, without fluff, "THE MACBOOK PRO WILL BE SLIM GOING FORWARD". You won't find it, because it'll never be said, because it wouldn't make sense to do that.