Just to prove I'm not lying, I present the most pointless YouTube video ever: http://www.youtube.com/watch?v=kxq0LLmee5E

Just to clarify, when the status display on my speaker set says "Effect: DD Digital" (except with the Dolby logo instead of two D's), it means it's using AC3 passthrough over SPDIF. Up till today, that only worked in Windows Media Center; now thanks to the driver update it also works in WMP and (as you can see PowerDVD).

The video also features DreamScene.