I know a lot of people are skipping Microsoft's product in favor of SONY's, but here are some things I think could help with the sales...
1. Have a model without the Kinect Version 2.
2. Have an update that allows you to play Xbox 360 games on Xbox One with Online support for the Multiplayer games.
3. Allow Xbox One to be open to ALL Indie Developers who wish to put their game on Xbox Live.
4. More Original and Exclusive AAA Game Titles, also explore past IPs that were left in the dust like Brute Force and Tao Feng.
5. Have a STRONG push in the Asian and Japanese market.
These **** a few things I think could help.