In Theory: Could Sony produce a PS4 Switch-style console hybrid?
https://www.eurogamer.net/articles/digitalfoundry-2018-in-theory-could-sony-produce-a-ps4-switch-style-console-hybrid

              Launch PS4 PS4 Slim Switch Docked Switch Undocked
Typical Power Draw 120-130W   70-80W    ~12W         ~9W


PS4Mobileなんてありえないわけだが