And that is where I disagree. Something like UltraViolet for rentals, or all-you-can-eat plans, sounds perfectly fine.
But for purchased content? No. A thousand times: NO.
If I'm renting it, it's reasonable to have restrictions on it. If I'm buying it, I'll take just the bits, thank you.
No burden. No cruft. No phone-home or provider-based device support decisions. No fine print that the service may disappear one day, taking my library with it. No fine print that any terms may change post-sale. Because it's a sale. Not a license.
Just the bits, thanks; in a standard format.
Steam is an example of a service that has done this exact thing incredibly well, and it would absolutely not have worked without Valve building up a reputation for integrity and professionalism.
If Valve came out with UltraViolet, I'd be chomping at the bit for it because I trust them to honor their agreements and plan accordingly to do so into the distant future.
I wouldn't trust the movie industry at all, let alone enough to sign onto a service like this. They may never be able to regain the potential for consumer trust, and it's their own damn fault.
Essentially a Steam for everything would never be able to have DRM otherwise certain devices would get locked out, which returns us to the original problem of DRM. Steam just locked onto a niche market and realized their potential.