Touch bar is a clever idea to test. The key is that it's tied to a mini-iOS implementation chip. Which means Apple "could" go full disk encryption per iPhones along with Activation Lock and all the other things. That's why there's zero removable SSD or RAM on these models.
I don't know about how I feel about my PC that locked down. Apple has done OK with iOS so far, but that's a bit much power to not abuse. On the other hand, with prying eyes everywhere, having a laptop where the data self destructs if the hardware is tampered with trying to skirt passwords isnt a bad thing.
Technically you can do this right now on a modern PC with TCM and OPAL SSDs but it's cumbersome and tricky to setup.. even harder to recover.