COULD it have the specs of the PS4?
Kind of. It depends on how big they would make it and how expensive. The Lenovo LaVie is running an i7 and Intel Xe which far surpasses the PS4. It would not be likely that they would make it a laptop style like that though, and it would be a form factor more similar to the Switch. Since Sony is a phone manufacturer as well they would probably go with Qualcomm and use the Adreno line. Which the best Adreno GPU out there does about 2.1 TFLOPS...which isn't everything but at least puts a number to it. The Adreno 680 hits 1.84TFLOPS which is exactly what the PS4 APU does. This being said...these parts are VERY expensive and requires significantly more power than the Switch. Which means they'd need a larger battery, etc.
Now, a portable console that PLAYS PS4 games natively...that is impossible. The die can only be shrunk so much, unless they go with emulation...which has it's own host of problems.







