I would rephrase it to "Is a hybrid Playstation 4 possible?".
This is essentially the only viable portable direction for Sony because it wouldn't require additional development resources from anyone and the system will just inherit all of the PS4's software and receive all incoming ps4. Titles like COD/Fifa/NBA and all the AA/indie games might carry it more than Sony a lot of Sonys traditional exclusives like TLOU2 which I think deserve a home cinema style experience. Although I think some RPGs will be great on the go FFVIIR/Persona etc. I think such a device could have decent potential because its supplementary and attract continued support of PS4.
How they'd go about it is interesting. The PS4 definitely has room for a further die shrink, but it seems that Series S/PS5 type emulation is more realistic in terms of delivery a quality experience with good battery life/size etc. This would probably mean waiting a year or 2 and using one of AMDs new mobile chips. I think its something Sony are definitely pondering right now.
-hybrid function with full PS4 digital compatibility, probably valued most in Japan but could be a decent minority of players who value in the west.
-Portable PS5 streaming at home ala Wii U
-Playstation streaming box in general
-Generic Tablet functionality (Netflix, Browser, Spotify etc).
A more risk adverse iteration of this could be a Playstation 4 mini, A SKU that doesn't have the expensive hallmarks of a portable (screen etc) but is small enough to fit in a backpack, can be powered via battery and can wirelessly stream video to any device within range. This is the kind of experiment they'd do to test the waters without any fanfare, maybe even only release it in some markets (like Japan)
