Nvidia's Arm-based PC chips for consumers to launch in September 2025, commercial to follow in 2026: Report

Like the Nintendo switch already is? (4x a57 cores)

Or like the Nintendo switch 2 is already rumored to be?

Yeah, that's what made me think of that.
The switch is crippled by how awful that ARM CPU is though.
For it to be an actual option for modern gaming, they need to get a lot further than any non-Apple ARM chip has.

According to some credible leaks Sony is going with AMD for the next gen. Maybe Microsoft but I honestly don’t believe they are capable of being able to deliver consumer products on ARM. Maybe next next gen?

That would break compatibility and optimizations made for AMDs architectures, so I kinda doubt it. Unless Nvidia somehow pulls massively ahead of AMD while at the same time giving MS and Sony a better deal that is.