Quote - The only reason by which Microsoft is puting DRM into Windows is for making money  from the content creators. If they don't pay Microsoft there's no reason to exist DRM in Windows, Windows will sell with or without DRM, well... a little less with DRM.

There is nothing in there that the content providers have to pay Microsoft for.  The content is already protected.  BD+, AACP and HDCP already exist, and none are under the control of Microsoft.  Microsoft apparently wants to merge the home entertainment center with the PC.  The content providers have said no go unless Microsoft can protect the content.

Any digital protection scheme consists of two components - the encryption of the data itself, and policies for allowing the data to be decrypted and presented.  The content necessarily must be decrypted in order to be played, however any device or piece of software capable of decrypting the data has the potential to completely blow away the content protection.

The only way you get a key for decrypting the data is if either you developed the DRM scheme yourself, or obtain a license for it.  In order to obtain the license one has to agree to the licensing terms, which include keeping their key secret and to not leak or otherwise allow unauthorized copying of content.  Under more recent protection mechanisms, it is possible to revoke a key if it is found that the player that uses it is found to violate the license agreement.

Vista's main job is to tighten the channel between the encrypted data and its presentation (and waste much CPU time with its paranoia)

Quote - Without the hardware's help Windows protection would be flawed, anyone would be able to install a device driver that access directly the hardware ignoring all the Vista protection.
Never mind, Vista protection would be flawed anyway, you always are able to create a device driver that bypass all the hardware and software protection.

Which Vista is supposed to prevent.  It will probably be cracked though, just about everything else has given enough time.  (Eventually someone will find a way to force Vista to accept an unsigned driver)

However the whole thing could just as easily blow up in Microsoft's face.