If you read the heading this topic it is about H.264 Hardware Acceleration!
Yes the deluxe has H.264 codec as standard as I mentioned earlier.
torbenp was after H.264 hardware acceleration to get that he/she needs PureVideo.
Do you need hardware acceleration to watch H.264 no, but
Is it worth it? If you have a compatible graphics card download it and try it for 30 days free and judge for yourself.
I'd download the latest driver for your graphics card and make sure you have DirectX 9.0c as well.