That's a bit of a stretch, though. Layer III means it's using IP to route signals and can transverse regular routers and switches. It doesn't mean that any Layer III system will be able to talk to any other Layer III system, like Dante talking to Ravenna.
However, there's the interoperability standard AES67 that's hopefully going to make it possible for different Layer III protocols to communicate at a basic level (audio data exchange, clocking et cetera).