The most recent Xbox gaming console to be released was the Xbox One, as of 2014. The Xbox One was released in November 2013 and serves as the follow-up gaming system to the Xbox 360.
The Xbox One was released during the fourth quarter of 2013, going up against the PS4, which came out just a week before. Those who are looking to purchase an Xbox One should know that the system is not backwards compatible with previous generations. This means that Xbox 360 games do not work on the new system.