According to Nintendo’s announcement, they announced that the latest face-to-face meeting will be held at 22:00 on September 14th, Beijing time. The program will last for 40 minutes and will provide information related to the expected launch this winter.
These contents are summarized from the fact sheet, and I believe they can answer your questions on this issue. There are more high-quality guides about Nintendo Switch on this website, you are welcome to check them out at any time.