I think the time is too early for a portable of the same power as ps4 but it needs to run similar code so perhaps a portable with quad core cpu's at 2ghz and gpu power in portable mode of about 300 gflops and the same 4GB of main memory as Switch but perhaps 2GB of video memory. Architecture very similar to standard ps4 with broadly very similar cpu power but much reduced gpu power. So it can run all the logic and game engine routines as a standard ps4 but output is much reduced in visual quality. Needs to be a little bit smaller and more compact with longer battery runtime. The screen would be 1080p but mainly streamed games from a ps4 or ps4 pro would take advantage of that plus simple games. Most big games would be forced to upscale from a much lower resolution, mainly 720p. I wouldn't bother myself going for a much more powerful docked mode due to cooling issues and the console being more compact than Switch.
1080p screen for use in a VR visor with games both streamed wired and wireless (wired to prevent lag) plus simple native rendered VR titles.
Long battery runtime 7 hrs plus.
5.5" to 6.2" screen, no removable controllers. Would look very similar to a DS4 but flattened with a screen in the middle and joysticks reduced in height closer to Vita. Also functions as a DS4. Would emulate Vita, PSP, PS1 and PS2 (as in if you own those games on psn it would run them). Dual micro SD slots and sim slot all models. Dock would be a simple power, hdmi and usb device but would allow for wireless display so you can remove the console from the dock to control games but would still have hdmi output. That's my idea of a good basis for a hybrid console.
