I watched the whole Nintendo Direct video and I am really excited to play this. Game design has been going to shit, conventions turning more and more mindless/automated/robotic. But then even going back to older, better designed games it is more than I want. I'm tired of objectives with all sorts of various shit getting in my way. Now that I am an adult that is basically what life is, so I don't want to fight things in my play time.
This game has no levels, no high scores, you don't kill anyone, and if you play together it is because you are sharing something. It has kicked all conventions to the curb and made something completely new. It is also something with a lot of freedom; freedom to select different sorts of challenges and aims, to be creative with every aspect, to play as long or short amount of time as you want when you turn it on. It's very exciting.