What I would love more than really any other tech improvement would be a “trusted” mirageos hardware/software environment which would remotely attest to its integrity and the degree of hardware protection it gave running programs. Ie a regular dedicated server, a VM, or a HSM attested to by some authority.
It sounds like you'd like Intel SGX. However, it seems Intel botched the implementation and their SGX VMs are leaking data through a number of attack vectors.