Microsoft does like to surprise us:Today's new games are indie platformer Contrast, and retro side-scroller Another World.
http://www.totalxbox.com/78672/contrast-and-another-world-now-available-on-xbox-one/?cid=OTC-RSS&attr=OXM-General-RSS
http://www.totalxbox.com/78672/contrast-and-another-world-now-available-on-xbox-one/?cid=OTC-RSS&attr=OXM-General-RSS