Players will be able to create tracks — even seemingly complex ones — by peppering their floors with "course gate markers" but the process hasn't been fully fleshed out yet. (Presumably, at least some of the course design happens on the Switch. ) And while Nintendo's trailer shows off a slew of in-game opponents, we've only seen two actual RC cars, one for each of the Mario brothers.
When it launches on October 16th, Mario Kart Live: Home Circuit will let racers steer tiny Mario-themed RC cars around their houses at (relatively) high speeds — meanwhile, cameras on those cars relay video back to the Switch, which overlays the track boundaries, item boxes and the rest of the usual accoutrements on top of the feed.
Nintendo is celebrating the 35th anniversary of Super Mario Bros. with lots of truly wild announcements, but the most peculiar by far is a new Mario Kart game that only partially plays out on the Switch.