https://www.theverge.com/circuitbreaker/2018/2/27/17058616/apple-patent-oled-screen-keyboard-macbook-pro-touch-bar

With the latest redesign of the MacBook Pro, Apple introduced the Touch Bar, a small OLED display that replaced the function keys at the top of the keyboard. But the company might be looking to take that concept much further, with a new patent for a full OLED display keyboard, via Apple Insider.

In other words, Apple’s patent answers the unasked question, “What if the Touch Bar was the entire keyboard?”