Earlier quoted context omitted.
Ultimately, DRM is untenable without users also being locked out of their own devices. Consequently pressure to support more effective DRM will always translate into pressure to restrict what users can do with their devices. Furthermore, the only defense against this is large open device market share: once closed devices comprise most of the market, DRM proponents can announce they'll stop supporting open devices, cr…
This is an FSF level understanding. Android devices are fully open and you can reflash them to whatever OS you want. Some remote servers won't give you service if you do that, but nothing is locking you out of your device . As Android dominates the global market, you already live in that world where most devices are open.
I think it's fair to assume that in a world in which almost every device supports attestation and makes it available to any service provider by default, without giving users an informed choice to say no or even informing them at all, service providers are much more likely to provide access exclusively to attestation-capable clients.
That, in turn, has obvious negative consequences for users with devices not supporting attestation (whether out of ideological choice, because it's a low cost device and the manufacturer can't afford the required audits and security guarantees etc.): Sure, these users will always be able to just refuse to transact with any service provider requiring attestation.
But think that through: We're not only talking about Netflix here. At what availability rates of attestation will decision makers at financial institutions decide that x% is good enough and exclude everybody else from online banking? What about e-signing contracts for doing business online? What about e-government services?
I am at the same time excited about the new possibilities attestation offers to users (in that they will be able to do things digitally that just weren't economically feasible for service providers, since they often have to cover the risks of doing so) as I am very wary of the negative externalities of a world in which attestation is just a bit too easy and ubiquitous.
In other words, the ideal amount of general purpose attestation availability is probably high, but significantly below 100% (or, put differently, the ideal amount of friction is non-zero). Heterogeneity of attestation providers can probably help a bit, but I'm wary of the inherent centralizing forces due to the technical and economical pragmatics of trusted computing.