Whether or not PS even wants to try this themselves, or has the dev backing based on whatever the hardware and software would comprise of, which is also questionable based on what would be expected by consumers, I can see two ways PS markets their future systems in terms of pricing if this actually happens.
Assuming a holiday 2018 release:
1. PS4 SS - $199, PS4P $299, Pro S $399.
2. PS4 SS - $299, PS4P $399, Pro II $499.
PS4P wouldn't have to compete directly on price with Switch, as long as it's an overall reasonable price in general, as well as based on it's hardware performance and it's games library.
In option 2, base PS4 would be the only model to have cheaper holiday sales pricing, with a potential permanent drop to $249 or even $199 earlier in 2019.
(I didn't go with $?49 pricing because PS seems to like to launch new/upgraded products at $?99 pricing)
PS1 - ! - We must build a console that can alert our enemies.
PS2 - @- We must build a console that offers online living room gaming.
PS3 - #- We must build a console that’s powerful, social, costs and does everything.
PS4 - $- We must build a console that’s affordable, charges for services, and pumps out exclusives.
PRO -%-We must build a console that's VR ready, checkerboard upscales, and sells but a fraction of the money printer.
PS5 - ^ -We must build a console that’s a generational cross product, with RT lighting, and price hiking.
PRO -&- We must build a console that Super Res upscales and continues the cost increases.
