I'm personally really glad to see development continuing on the Hurd. It seems like the two biggest disadvantages it had were complexity and performance overhead. I'm interested to see if the adoption of multi-cored processors would mitigate the second disadvantage, if it can be easily parallelized. Microkernels offer some really awesome potential benefits, so it's good that the technology is at least being played with.
According to bits of information scattered around the MSDN website, since Windows 7 most of the drivers have been moved to userspace already. Even the graphics driver for Windows now is half userspace half kernelspace. Perhaps it is no coincidence that this was the reason Windows 7 and Windows 8 suddenly became so stable (my speculation only).