Twitter user @Tanfuku showed a concept for how HoloLens could expand the capabilities of existing games by displaying UI elements outside of the game world.

It's something we've theorized as a possibility in the past, but this video gives us a better idea of how it could look in practice.

Tanfuku's video shows how HoloLens could be used by the popular MMO Final Fantasy XIV to display stats, maps, inventory menus, and other panels that are entirely necessarily for gameplay, but heavily clutter up the interface.

Systems like the Nintendo 3DS and Wii-U also make use of extra displays to show menus, maps, and other UI elements to prevent them from interfering with the main game itself.

Microsoft has also dabbled with these sorts of features, with Xbox Smartglass. Using a phone app, some games were able to display second-screen functionality and even gameplay. An early version of Tom Clancy's The Division had a full-blown tablet companion game, allowing users to control an in-game support drone via Windows 8-based touch devices. I saw The Division's drone companion app running on a Surface 2 back at Gamescom 2014, and found it to be very impressive. Sadly, it never made it to the full game due to balancing issues. HoloLens could make these second screen experiences far more compelling.