I think diminishing returns on that power increase will make it a harder sell. In the demo of PS5 pro it was very hard to see any difference. They will need to use benchmarks or something other than just show the visuals. 

PS5 -> 115mil
XBSX -> 58mil (GTAVI will send Xbox sales to the stratosphere, though maybe not as high as for PS5.)
NSW -> 156mil

It was hard to see because many things are holding the PS5 Pro back:

1. Only a GPU upgrade, the Zen 2 CPU is pretty slow by today's standards. The small clock speed increase doesn't do much to address any CPU limitations, especially in performance mode.
2. RAM still only 16GB, which is pretty small. It already wasn't big when the PS5 came out, but the need for RAM and VRAM went up sharply since then. Which means smaller, more compressed (and thus less detailed) textures and less details overall. It being clocked faster doesn't help in that regard.
3. The overall performance increase is pretty small with just 45%. The PS4 Pro managed almost double that over the PS4.
4. Old games, many even PS4 being originally PS4 titles. There wasn't much to improve in those titles to begin with.
5. And of course, spotty YouTube compression didn't help when it came to noticing the difference.

Had Sony chosen to increase the RAM to 24 or even 32GB and updated the CPU to at least Zen 3 with a slightly smaller GPU, I'm sure it would look markedly better for the same price.

NSW 162.89mil
PS5 97.652mil
XBXS 50.247mil

PS5: 105M
XBS: 42M
NSW: 155M

All numbers are a bit on the lower end, so +5M for every console is possible I guess.

Tbh we might be underestimating the PS5/SeriesX sales a bit. Yea sales for those consoles are slower than the previous gen but I feel like GTA 6 could be huge enough and singlehandedly change that. Probably the most anticipated game in history and will be exclusive to consoles for nearly a year before it goes to PC, and it's gonna be a next gen exclusive giving PS4/XboxOne owners a true reason to finally upgrade, sales been a bit slower for next gem adoption because of how many cross gen games there are at this point.

Switch 155m

PS5 115m

Xbox Series 45m

Switch: 159-166 million (161 million)
PS5: 109-118 million (115 million)
Xbox Series: 44-49 million (48 million)
PS5 only sells under Wii and PS1 if the PlayStation brand takes a notable hit in positive perception. There's almost no chance PS6 comes out before November 2027, and there's a good chance it takes until November 2028. PS5 is still the flagship PlayStation for years from now and even if PS4 hasn't been discontinued yet, it's selling virtually nothing by comparison anyway to affect PS5 sales. I wouldn't put it past Sony to announce this year that PS4 was discontinued in mid to late 2023, or even early 2024. It's not exactly easy to find new PS4 consoles. 

Additionally, even though there are used PS5s out there, GTA VI will move millions of PS5 units, even if under 10 million. 

Should of bought a Switch. Loads of classic AAA Nintendo exclusives on that console. Why buy a Sony and a Microsoft console?? Daft combination considering for the best part they both share the same games.

High specs doesn't make good games. Elden Ring and Tears of the Kingdom were near perfect, how would better specs have improved those games in terms of experience??