cool as heck idea, but idk if the technology is available/affordable enough for it yet
and their idea of all major manufacturers 'working together', really i think that was a silly way to put it; i'm 99% certain they just meant individual companies would create different blocks and people would buy whichever blocks they wanted, meaning the competition would still be there, but it's obviously much less profitable than selling entire phones. it'd work better as a single company (maybe accepting third-party blocks as well), but they probably aren't financially able to afford to manufacture everything.
it's an idea, but it's one that wouldn't happen without a few years of work. hopefully it will eventually though.