I also don't think it is particular hard to implement. Some sort of "need to call home to get today's code" mechanism has been around for ages and it is common in consumer hardware.
And it will allow a centralized authority to keep track and disable any rogue chip remotely - lots of people would like that.
On tge other had, isnt thus an "alignment" benefit? Pair this with the fingerprint scheme to track the model, people using nefarious models,naively, then have a xhance to leak theie location.
Ultimately I think this will be very self-destructive for US tech supremacy. But we will see what happens.