One thing I wondered about the Dwemer is the extent of their transmutation. It must not have been 100%, because the ghosts of Dwemer still appear throughout their ruins, and the machines in their ruins still function to a degree.
I've always assumed that the Dwemer ghosts are mostly the ghosts of dwarves who died before their dissappearance, and machines don't need the people who built them to be physically present to work, so I'm not sure why the machines would stop running if their disappearance was complete.
In any case, there IS one Dwemer who survived their dissappearance in Morrowind, but since he was apparently in an outer realm at the time, I think that's because of that
The centurions most likely have some sort of system that allows them to receive power from an external source, hence why in one doccument in Morrowind, it's noted that one stopped functioning after it was taken too far from Vvardenfell, but when the ship turned around and went back, it started up again, though the details of how this works, like most of their construction, remains a mystery.
But back to the original question of the thread, I don't see much else Skyrim could reveal about the dwarves that has not already been told to us in a previous Elder Scrolls game, it seems to me that all the things we really need to know about them have already been answered, in fact, I'm not even really sure I approve of giving a definate explanation for their dissappearance. I think I liked it better when it was still mysterious, and though there were theories, we wern't told for certain which one was true.