You are right about 9.5mm drives from various vendors but what about the 500GB drives, one or two platters? They do make 500GB platters. The original argument was that apple was cutting edge with everything and my claim is that they make necessary sacrifices to appease the masses.
9.5mm = double platter
7.0mm = single platter
So 500GB drives, just like all drives Apple uses, are double platter. Single platter are rather rare and also more expensive. Mainly meant for smaller laptops where the few mm can really matter.
What problems have you heard about Sandforce controllers. I'd expect an expensive SSD to deliver sustained 550MBps transfer speeds. Not hovering around 200MBps. Call this a pro need, to video, audio, photo.
Where shall I start? SF-1200 based SSDs suffered from hibernation issues where the computer would freeze when turned on again. Plus all the unexplained freezes, DOAs and other failed units. SF-2281 based SSDs have suffered from freezes mainly and the reliability isn't all that great either (lots of failed units and DOAs). Just do a Google search. It's general knowledge that SandForce is crap in terms of reliability.
Don't get too excited about the synthetic benchmarks. Will you really notice the 0.1 second difference between 200MB/s and 500MB/s? Besides, what pros want is reliability. It's far more important to get your job done, even if it meant doing it a bit slower. The worst case is that something in your machine fails and you have to waste precious working hours to get it fixed.
Although disappointing, this is too what I am expecting. I believe we might see an optional hi-res option (retina) update for those though. I was sort of ceptic, but considering OS X's builds latest hints, I guess it's a more credible option. Not only it keeps the costs down, but it also allows them to make some more bucks for on those who want the extra resolution.
If there will be "retina" displays, then they will be standard. That's my guess.
"Dramatic refresh" is very subjective.
Personally, I find that most people here seem to relate "dramatic refresh" with "case redesign". Which is really the least important part of a refresh.
I consider the early 2011 MBPs to be a major refresh, because they brought quad core CPUs, significantly better GPUs, SATA 3 drives and Light Peak (Thunderbolt still stupid name). The MBPs haven't seen a comparable jump in performance for years. Likely since they were introduced. And they aren't likely to see a similar jump in performance for a few years yet. Maybe Haswell, maybe not.
Performance bumps are always predictable. Okay, quad core in all 15" models was a pleasant surprise but all the other specs (except TB, which is quite useless at this point) were pretty much known beforehand.
Case design is one of the few things that is very unpredictable. Then if you add something else significant, like SSDs and retina displays, the update will be enormous. And we get faster CPUs and GPUs as well.
Haswell will still be quad core for mainstream, by the way, so we probably won't see that huge performance gains.