I don’t read nor speak Russian, but from the looks of this amazing keyboard i would guess it has small OLED screens under every key that can display the current keyboard setup. language or custom mapping.
http://www.artlebedev.ru/portfolio/optimus/
english version : http://www.artlebedev.com/portfolio/optimus/
update : more info …
http://www.gizmodo.com/gadgets/peripherals/input/index.php#optimus-oled-keyboard-112517
Holy frik, that would be way cool!!