As a reminder, the PlayStation Portal, or Project Q, is (according to leaks) based on Android. It doesn’t run the games itself, it merely streams them from your PS5 and your handheld then serves as a controller with its own display.
I’m wondering why anyone would prefer that over simply using a regular Android phone with a good controller and the PS Remote Play app?
For the device to do anything near 1080p with as little latency as possible, the device MUST have a dedicated graphics chip, probably Mediatek or, hopefully, Snapdragon. Also hopefully, it might have some kind of on-board storage, at least for AndroidOS + updates, hopefully a MicroSD port for media sharing. With all of this in place, turning a stream-only device into a regular Android one is pretty much trivial.