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?
They even mean the same thing technically! The “jail” specifically refers to a jailed shell, as BSD jail, so both jailbreaking and rooting (as in Unix root) both quite literally mean the same thing, privilege escalation.