Developer Shin'en Multimedia details the benefits of Nintendo's new hardware in an interview with Gamereactor.
"On Wii U it was tough to get to the visuals we wanted at 60fps. We had to use a lot of tricks to make it happen at all. For instance, on Wii U we were able to pull off two player split-screen racing at 720p and 60fps. Not bad at all, but with three or four players we had to scale down 30fps. Well, most racing games today don't even feature split-screen at all, so we didn't felt too bad about it. However, on the Switch we didn't had that limit. On Nintendo Switch in TV mode we now have four player split-screen, at 1080p and 60fps with much more details enabled."