I think the only one I'd consider is the NX, which is saying a lot if you know my rep of Nintendo "hate" (it's not hate, it's a disappointment but it get labelled as hate).
It's interesting, usually it's PS1, PSX. Ps2, PS2 slim. PS3, PS3 slim. PS4, PS4 slim, PS4 pro ... so it's the first time, there has been a .5 but I don't even see the difference in the 4 and 4.5. Fuck, I still struggle on SD to HD, fuck all chance on HD to 4K, might have a shot with SD to 4K though. I'm also a big supporter of graphics tech can fuck off, pour more time and cash into gameplay development and not what I read the other day about HDR, like do people really give a fuck about that? To me, that tech was done at resident evil 4 or 5, something about walking out of a building and you get blinded a little "while you're eyes adjust to the light".
You have all the graphical updates and what not but as long as the game looks good, I'm happy. I don't care about sky boxes and better lighting and particle effects and all this other shit 'cos after 20 minutes you get used to it and you're still stuck with the same gameplay you've had since the PS2 era.
So, unless the Pro starts putting it's extra horsepower into things like more shit on screen (such as playing dead rising with 3,000 zombies on screen with more persistent bodies) or more shit to do, I couldn't give a fuck.