http://www.ign.com/articles/2015/06/15/e3-2015-xbox-game-preview-brings-early-access-to-console?abthid=557f0bf8fdc7ceea5c000014&utm_source=IGN%20hub%20page&utm_medium=IGN%20(front%20page)&utm_content=3&utm_campaign=Blogroll
Xbox players will be able to play in-development games using a new feature, called Xbox One Game Preview. Comparable to Steam's Early Access, the program begins today for Xbox One preview members who want to try before they buy.
Game Preview will include The Long Dark, Shelter, Elite Dangerous, and Day Z.