Nex Computer has announced the NexPad, a device that doubles as a tablet or a secondary display. The NexPad has a 12-inch display, a kickstand and costs US$249. Nex Computer hopes to ship the NexPad in July 2022.
https://www.notebookcheck.net/NexPad-New-Nex-Computer-device-launches-as-a-tablet-and-a-secondary-laptop-display.590464.0.html
This looks great. This can be a worthy spiritual successor to the ASUS Padfone Docking Station. That said, there is no info on whether this tablet dock will have a 3.5mm audio jack. It will be quite a bummer if it doesn't have one since the similarly-priced Alldocube Expand X have it.