If they want to show off some ray tracing functionality on the Switch 2 chip, this would probably be the game to do it with. 

Even increasing the resolution is a bit of a waste, just take the stock 540p-720p undocked and docked 720p-900p and let DLSS do the work of the higher resolution, you don't need to use any pixels there. It's already 60 fps from the the looks of things. 

If the trailer was running at 720p, then it was running on Switch 1. I think some people are overstating how good Prime Remastered looks when they say it looks pretty much the same as the Prime 4 trailer. I really don't think so. Prime 4 looks like a pretty substantial improvement on Prime Remastered in terms of graphics to me.

I wonder if Monolith Soft is helping at all. The environments look like something out of a Xenoblade game.

It does look a bit better than Metroid Prime Remastered, but I think that can be put down to Retro having more experience with the hardware by this point, more time, and a bigger budget.

Hard to tell from a short video but P4 seemed to have better textures, volumetric and particles effects.

It is indeed hard to tell from what we've seen, but to me, just by eye, the graphics look slightly better than Remastered, the main difference being that it has much more happening on screen.

This sort of mirrors what we saw going from Prime 1 to Prime 2 on Gamecube; the amount of stuff on screen scaled up a bit as they got more experienced at leveraging the hardware.

The Talon overworld look alike nailed the feel for me. Loved the music of that place in the trailer.

Absolutely.  And particles, volumetric really pop on a big screen with high contrast.  Via YouTube the visuals look subtle but in real play it can be quite impressive.

Yeah games will almost always look better on a TV than on Youtube.

I did find a higher quality version of the trailer with less compression: https://assets.nintendo.com/video/upload/Nintendo%20Direct/2024/06-18-2024/video/spotlight-04.mp4