I think the question of whether this is an achievable goal an interesting
question. However, I'd like to address Secure Boot in particular.
It seems to me that Secure Boot nothing more that an attempt to expand to
x86 systems the unacceptable precedent present on ARM systems of locking
down control of the machine with hardware-implemented strong cryptography.
The cunning aspect of this is that it's veiled as a security measure,
opponents of which can be vilified.
I see this as a real danger, and the beginning of an incremental push toward
bringing ARM lockdown to x86. Almost anything can be achieved by breaking it
down into a series of small enough steps.