I remember the next generation Unreal Engine demo from a few years ago. I'm talking about the dystopian future one with the guy fighting robots in a dark city. That demo was incredibly impressive for the time. Many modern PC graphics functions weren't being used because every game was still being built on the X-Box 360. It was nice to see a big company like Epic go all out showing us the potential for next generation 3D graphics.
Unreal Engine 4 has become publicly available since then. I thought that would mean we would see a swarm of ultra detailed next generation games come about. Instead, there are tons of games with TBD release dates waiting to finish development.
What I'm saying is that even if you began development on a Nintendo Switch title in UE4 TODAY, it wouldn't bear fruit for another two or three years at the very earliest. Even still, it's really cool to see that the Switch now officially has support for UE4.