That has been the way of how things were done in hardware from the start I'd say, just look at any moderately complex PCB - you can see each IC as a "microservice" of sorts, even analog function groups (oscillators, bandpasses, filters, ...) made out of discrete components can be considered "microservices" of sorts IMHO.
All this is is moving the definition scope of an individual "service" from the IC to the chiplet level.
That's how it feels to me as well. It's just a matter of cyclic evolution.
We can specialize hardware at the chiplet level and at some point, I expect more players and more standards out there that "synchronization" and "compatibilty" would become a bottleneck/burden.
We will go back to monoliths eventually again is my guess.
All this is is moving the definition scope of an individual "service" from the IC to the chiplet level.