Y'all are being mighty optimistic. 😐
As far as I understand, it's up to the dev to implement that sorta crossplay capability.
Meaning, we may have a few big budget games that offer this, mostly using their own networking stuff like origin, and there'll probably be a slew of smallish indie type games that attempt to offer it, but I kinda doubt we will see any of that connectivity in the overall majority of games. And that's not even considering the restrictive licensing of console libraries, including network ones. I'm guessing here, but I'd be willing to bet most manufacturers have lockout clauses and require extensive paperwork to enable that sort of functionality.