You can already do this with Samsung Dex. I've been on S23 and now S24, Dex is mature and works great. Don't have a laptop anymore. Simply boot up code_server in termux and use a web browser.

It will likely be at least a year before Google manages to get a good version out the door. You can preview the desktop mode with floating windows on beta, but it's very buggy. May not even come to Pixel 8 officially, only for Pixel 9.