Didn't the Lenovo Legion Go already have this joycon-as-mouse feature a couple of years ago? It was talked about widely in the press, e.g. <a href="https://www.techradar.com/computing/gaming-computers/the-lenovo-legion-go-is-great-and-also-has-the-weirdest-mouse-ive-ever-seen" rel="nofollow">https://www.techradar.com/computing/gaming-computers/the-len...</a>