for that it would have to be priced somewhere in the ball park of the steam deck and offer more compute power than that. i don’t see this from sony, i expect either a very expensive device marketed as as “premium” handheld or an iteration on their PlayStation Portal(?) streaming handheld.
the touchpads atleast feel like the ones on the steam controller.
flickstick is a control scheme where your stick only controls the camera horizontaly, so if you push the stick down you’ll spin 180° if you push it to the right you’ll turn until your character faces to the right and so forth.
deck is mostly more input options (right stick, d-pad, 4 back buttons instead of 2).
the biggest difference is the placement of the touchpads imho, as i cant use both shoulder buttons and the touchpad on a side without adjusting my grip, but that only mattered in shooters for which i use flickstick on the deck and not the right touchpad.