Rootax
Veteran
The most probable choice is to find a non-Nvidia SOC for future next-gen consoles, and use 7nm tegra for backward compatibility and a secondary SOC.
It would be pretty costly... And going the non nvidia route means another dev environment/api/dev tools...
If you're gonna do this, hell, stay with nVidia even for the new soc. I really believe a dlss2.0 capable SoC would do wonder (of course devs have to implement it on their engine). Yes tensor cores are not cheap, but raw power to deliver 1440p or more isn't either...