So going by the video, it seems that the lighting, foliage, draw distance are significantly better on PS4 than Switch. With some minor details being better on PS4 close-up. The Xbox 360 version looks considerably worse than both.

I read that the Switch version has a more stable frame rate and is less buggy than the PS4 version.

Compared to the PS4 version when launched it's probably less buggy, remember the PS4 version has been patched several times since launch, and elements from those patches are no doubt included in the Switch release.

Honestly Skyrim with less details looks better imo

Looks like that 2018 game, Away 

I must admit, that actually looks really cool.

As for the video comparison:
Skyrim on the Switch clearly looks better than previous gen versions. The PS4 looks the best overall, however, the Switch version is very close in certain areas. It is definitely a down-scaled version of the PS4/XBO versions of the game, rather than an upgrade of the 360/PS3 version. 

^ All those picture down't show up for some reason.
How does the Switch version stack up against the psvr version.
Now streaming:

https://www.youtube.com/watch?v=rdE3oGc1AEo

Ah now the shots load, looks nice. That look would work very well in VR too.

Is that PS4 footage or PS4 PRO footage?

Either way, the Switch version look great for a portable version. Kudos to the developer.

I'm liking this art style.