If you used Skyrim mods, you might remember Dynavision. Well, it's also available for Fallout 4 and Xbox One at that.
When enabled, Dynavision provides the user with auto-focus and a depth of field effect you might get from a camera.
What this means is that objects you're looking at will stay in focus while stuff in the background will blur. It's a neat effect and particularly cool for those of us that like to share screen shots of the game.
The photo here is an example of what you get from Dynavision and you can take a look at the full gallery right here. You can also take a look at the video below.