I actually went to the E3 couple days ago since it was through the 13th and 15th. I got the chance to play a little of it but it wasn't all good in my opinion. As a switch owner Mario Kart 8 Deluxe is still better.
Also, why would you get a switch for one game? There's plenty of good titles for the Switch (Zelda, Arms, Minecraft, Wonder Boy: The Dragon Trap(Master Sega Originally), Mario 8, ultra street fighter 2, many others). There may not be a lot but the switch is still pretty playable for what it offers but hey i'm really waiting for Skyrim to be released on the switch.