Yes, perhaps in the future, movie and computer game studios will lobby hardware manufacturers like Intel, AMD and ARM for locked-down hardware (non-free BIOS etc.) in order to protect their DRM.
I think general purpose computers and entertainment computers really need to be separate. Movies and AAA computer games cost a lot of money to produce, so I understand that the studios want to protect their investments with DRM. However, locked-down computers that users don't control themselves are fundamentally incompatible with a free society.
The only solution I can see for people to both preserve their freedom and enjoy some AAA content is to own 2 computers: 1 for AAA entertainment and another for everything else. Fortunately, computers are getting cheap and tiny.
> If you don't want DRM, don't watch media that requires DRM.
Well, obviously I don't.
> Nobody is making you use it.
The point is that there are fears that this could change once DRM is entrenched enough -- and getting into browsers is a Big Step along that road. (Hence the talk about changing General Purpose computers into appliances.)