https://www.gamespot.com/articles/e3-2018-nintendo-reveals-super-mario-party-for-swi/1100-6459709/

Nintendo revealed a brand new Mario Party game for Switch during their Nintendo Direct E3 2018 Press Conference. It’s called Mario Party Super and the portable console has introduced some interesting new twists to some of the multiplayer mini-games.

The trailer showed a number of attractive young people playing Mario Party Super using two separate Switch consoles in handheld mode, Joy-Cons detached from both. With a battlefield map on both screens, they arranged the two consoles in a number of different configurations to create one map that connected between the two Switch consoles, and proceeded to have a four-player tank battle.