Microsoft did this a couple of years ago with Hololens and Minecraft..
Or is there some consumer product not listed on their page?
Also, Apple has almost never been the first to do anything. Tim Cook even admitted this yesterday. What Apple brings to the table is an actual polished solution. Which having used Hololens extensively it absolutely is not.
Yes, badly and expensive. And didn't follow up on it properly.
Meanwhile; https://www.metavision.com/
Unfortunately, the old-fashioned keyboards also worked when they weren't hard up against the screen - thank god we have these new 'smart' keyboards that have to lie flush against the screen to work.