Re: "o not being able to play my bluray on my DVI monitor"
Whatever Berners-Lee had suggested you'd still have DRM in your browser. Would you rather have it in a documented and standardised place or do you want all the content providers to bodge their own implementations into your browser? Because they have lots of money and want DRM so they're going to get DRM however much you might not like it. Berners-Lee is just a little more realistic about these things and realised he's better off sat at the table where they discuss this than pouting in the hallway.