I'm all for healthy paranoia, but some things you mention don't seem to have changed really. Uefi is just as opaque as BIOS - why not mention both? TPM is just a tool. It can be used for DRM, it can be used for safer full disk encryption (keeping keys out of the readable memory). Firmware is just a cheaper and updatable version of original purpose-designed, or factory-programmed ROM chips - they have the same capabilities for messing with you (from the producer's point of view).

It really bothers me when people assign this to new technologies in general. Yes, some are actually new in desktops, like SMM. But most have been there for ages and just got an updated name or architecture.