Not gonna happen but I just want an actual portable-handheld console again that'll go in my coat pocket and not a small tablet with controls stuck to it. Everyone is obsessed with large screens which results in something that needs to go in your luggage. I'd totally go for something smaller, more compact and flat pill-shaped that you can just whip out in a split-second.
PSP was 4.3" and PSVita was 5"; each at 1.76:1. I'd totally be fine with a quality 1.78:1 5.5-5.7" display with a tough but minimal bezel.
+5G / Wi-Fi6E / SD Expansion Slot
The appeal in this is that it'd be the only actual truly portable device in the vein of older dedicated gaming handhelds. A non-existent market segment at this point.
I'm not really interested in a PS5 or PS6 in my hand, for those experiences I'd rather use the actual consoles on a proper display. But for everything else I'd love something small and ergonomic; not just for play but for travel.
An alternative could be providing two options:
A PSP "Pocket" with a 5.5" 900P display (psvita-inspired design with triggers that fold in and lock).
A PSP "Portable" with an 8" 1080P display, a 30-50% GPU bump and twice the internal storage (portal-inspired design).
Otherwise with the same hardware, software, functionality and visual theme/stylings.
I really don't wanna see Sony go the route of a main home console which uses a dockable handheld like Ninty; as in a system that's configured so that it requires flagship games to run on limited hardware. You can scale resolution, fps and fx, but fundamental game function and simulation could end up getting hamstrung. XSS is bad enough, that'd be a whole other level.
A separate, dedicated handheld system that gets a boost from being docked as well as having a display output would be fine (perhaps it could even pair with the PS6 in various novel ways). But I'd like the main home console to primarily remain its own thing pushing technical boundaries.
Of course, the big issue with a dedicated handheld with its own experiences is you need more resources to produce them. They'd require a bunch of smaller teams putting out at least two solid first party AA+ titles a year, plus a bunch of third party support. Though the appeal of unifying the entire back-catalogue (licenses-permitting) would help, given that more rudimentary or nostalgic experiences fare better on handheld.
I think the wider market has gone full circle and I think there's a gap between Switch & Steamdeck. The OG PSP was very successful by all measures except comparisons to the Nintendo DS; and the PSVita was -- in my eyes -- very badly timed due to the big mobile transition and the narrative around both handhelds and consoles in general supposedly dying; the nail in the coffin was poor support in terms of software/hardware/marketing from Sony as their resources seemed to be all-in on recovering from the PS3's rough start and prepping for PS4.