900p seems fair, obviously much improved (likely absurdly) over the native resolution, but still clearly not full HD (and certainly not beyond).  540p DLSS stills leaves a softer image and is a step behind 1080p, and things like hair do not render correctly.  I think most issues on forums such as VG, is certain people want to argue with the mentality of "either/or" when, such as this case, both statements are true; 1) 540p DLSS is a huge improvement 2) 540p DLSS isn't as clean/sharp as native 1080p

The Fallout 4 port holds up fairly well; despite not currently using DLSS (it is being added later via in update) it significantly outperforms the last gen version.

The 30fps mode is mostly stable and sticks to 1440p much of the time, up from 1080p with frequent drops into the 20s on PS4.

There's a 60fps mode which runs at a dynamic 1080p with drops to 864p or 720p at stress points, though the framerate can falls into the 50s or 40s in demanding areas, which isn't surprising as even the PS5 version wasn't a locked 60fps.

The 40fps mode seems a good middle ground, and is mostly a rock solid 1080p/40.

Not bad at all.

Switch 2 is doing pretty well when it comes to third party games. It's clearly very comparable in terms of GPU performance to PS4 Pro. I'm just dissatisfied with the LCD screen and CPU performance. Having upscaling tech based on DLSS 4.5 or even DLSS 4  would be amazing too. Hopefully, Nintendo can address this in future updates.

Is that native 1440p, if so very impressive for a PS4 spec game. Potentially the first we've seen?

Been playing RE9 on both SW2 and PC (I play a section of the game on a 5090 PC, then my partner plays the same section on SW2.) The difference between the two feels like the traditional gap between consoles and PC for the last few generations. Like Skyrim PS360 vs. Skyrim PC, or Final Fantasy XV PS4 Pro vs. a GTX 1080 PC. Definitely doesn't feel like a SW1 vs. high-end PC situation (think Hogwarts Legacy or Doom Eternal, as canonical examples.) 

It's an obvious difference when side by side, but still the same experience at the end. 

Also tested the game on my Z1e Rog Ally, and had to spend like an hour to get rid of screen-tearing. For some reason VRR wouldn't work properly, so I had to use V-Sync with a totally stable 60fps to get it to stop having the worst screen-tears I've seen in a game in the last decade (screen tore up into four bands.) When I did, I was able to get a pretty solid 60fps at SW2 comparable settings, without frame-gen. Only using FSR 3.1 @ultra-performance 1080p target currently, but might try injecting FSR4, to see if it cleans up the image further without tanking performance and re-introducing the screen tears. Looks a lot better than what I've seen of the Series S version, probably because of FSR 3 >>> Capcom's heuristic-based TAA. 

Yep, native 1440p; the game doesn't use DLSS at present, it is being added in a later update.

GRID Legends was also a (dynamic) 1080p PS4 title that was a dynamic 1440p on Switch 2.

Looking at that review its a mixed bag. Visual detail etc is PS4 level or below, resolution docked slightly higher, 30fps maintained more reliably when docked. Lowest portable resolution 504p under load. However it seems overall job done well within the limitations of Switch 2 and its CPU performance. However pricing is extremely high for this old game. I looked at what I was missing from my PC Fallout 4 to make it the anniversary edition and the only thing I'm missing is the creations bundle which is £17.99 but seems utterly pointless and badly reviewed.

https://store.steampowered.com/app/3868650/Fallout_4__Creations_Bundle/

However this feels like it will be a much better game when DLSS is applied and later patches to fix many of the problems like crashing and hopefully then it will be much cheaper. 

I can see you can get the Fallout 4 Game of the year edition for £8.99 which is all you need really on PC. Paying £50 extra for the Switch 2 version seems too much especially as you don't need the creation bundle at all. What would be fair pricing on Switch 2 for this? I feel like it shouldn't have been anymore than £29.99 and perhaps discounted to £14.99 on occasion. They can keep the creations bundle to be honest. However performance wise on Switch 2 I think is fine yes you can play it on Steam Deck with more detail, better motion clarity, lower input lag and better frame rates but Switch 2 seems fine and I suspect it will get better with higher resolution DLSS output soon. I'm sure I will get Fallout 4 for Switch 2 at some point as its one of my favourite games but I'm not paying the early adopter tax. I've played a lot of Fallout 4 on PS4 standard console and absolutely loved the experience and Switch 2 seems to be overall an upgrade on that. Mind you, you can probably buy a base PS4 or Xbox One with Fallout 4 for less than the price of this Switch 2 version.

1440p is about 80% more pixels than 1080p, that's not "slightly" higher. 

The 40fps mode generally holds 1080p which is a 33% increase in pixel throughput vs PS4, and that's without accounting for PS4 often falling well below 30fps.

I also think the game is overpriced and haven't bought it for that reason, but let's not forget that this isn't the pricing of "the Switch 2 version", but the pricing of the Anniversary Edition on all platforms. But yeah, it should have been like in $20-$40 range, not $60. 

As for the graphics, I am not making any judgments until the DLSS patch releases. I suspect that docked performance mode will look as good or better than the 40fps mode in that scenario, and the 30fps mode will look much better than the PS4 Pro version (which is also native 1440p.) The handheld modes will be where the most improvement will be seen though. 

I find the jump from 1080p to 1440p to be quite impressive, at least on my 65-inch screen at 7-8 ft away. The jump from 1440p to 4k, I can leave it, not worth the resources IMO.