It’ll probably work the other way round - the limits of the display will probably influence the visual design and objectives of the game (ie I can see a more abstract art direction and well defined objects like in say, Katamari Damacy). It’ll be interesting to see what they’ve come up with.
That said, I wonder how the display will look. You don’t strap it to your face which might make a difference, and the field of view will probably be lower, and there probably won’t be fast movement because of ghosting.
But the pixels of a 720p display are 30% smaller than a 1080p display. The RGB subpixel nature in the Switch’s screen might help to make up that gap slightly as well - an OLED display shares subpixels between neighbouring pixels, leading to a lower effective resolution (PenTile OLED has 2/3rds of the Subpixels of an RGB stripe layout). So resolution-wise it might not look so bad.
The Virtual Boy screen still impresses me with how little ghosting there is due to how fast the oscillating mirrors move. Resolution and refresh rate must have looked like a massive step up from Game Boy, but of course both wouldn’t be improvements compared with CRTs at the time!