To add on to why I'm not exactly hopeful, I just don't think its that much of a selling point for consumers compared to the competition.I don't hate the idea of a new portable playstation, but I am not hopeful either.
The Nintendo Switch has many exclusives on it (which Sony lacks in right now) and the Steam Deck is basically a portable gaming PC that allows for a lot of freedom. Maybe it will be good for people who already have a solid library for their ps4/5 (if you can play those games on the portable system) but I don't know.