Depends a lot on whether they're going to do a handheld or not and whether it'll be next gen hardware.
If that were true, with a next gen handheld SKU around 2027, I don't see why PS5 couldn't remain relevant for the entirety of next gen as a cheaper $399 home console. SNY could just keep selling PS5 alongside PS6, even if that meant a Super Slim PS5 model. However instead of spending money on engineering a PS5 Super Slim, maybe it would be better to spend money engineering a cheap $399 PS6, and discontinue PS5, I dunno. Yet SNY is going to want to offer something more than the PS5 Pro, so they could offer PS6 Pro right from the start as well, so you end up with either 1 old and 2 new SKU's or 3 new SKU's next gen.
PS5or(PS6) - $399 - 10TF or 12TF
PS6Portable-$499 - 5TF or 6TF
PS6 (Pro) - $599 - 20TF or 24TF
Shorten this generation to 6 years if need be.
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.
