I could see Nintendo bucking this trend but they have enough IP to be their own island.
It might be smart for Godot to punt; it lets them go faster than Unity and catch up
Microsoft's strategy is to sell PC games on Windows devices. They might call some of them Xboxes.
Valve's strategy is to maintain a Linux distro that can play PC games.
Sony also ran.
Are you sure about this? I mean, as awesome as that would be just look at the mobile market - Android had every chance to be a properly open OS (e.g. AOSP), but instead its a mess of flakey drivers, locked down bootloaders and other anti-user practices that curb our freedoms with our devices.
I foresee that trend mostly remaining as it is in regards to consoles as well (and IoT devices), outside of projects like Steam Deck. But then again, I'm still bummed out that it wasn't possible for me to install Linux on my PS4 and use it as a development box (since updates explicitly fixed any vulnerabilities that would allow for that), because its form factor was great.
Hell, it's probably just a matter of time until PCs and laptops are sold with locked down bootloader and only run Windows or whatever other manufacturer sanctioned/mandated OS would be included.