Personally, using Linux, I don't much care about Vista or it's DRM.
However, those signed drivers could be a worry for me.
I don't play movies through my computer so I can watch them on my
computer screen, so the DRM problem mentioned in the article you
referenced is not an issue for me.
I do process sound files through various software programs running under
Windows, typically so I can load them onto my iPOD. I haven't had the
first "DRM" related problem.