"At that point, Microsoft finally kicked things into high gear and began offering several great Xbox One bundles alongside a serious price cut" http://bgr.com/2015/02/18/ps4-vs-xbox-one-vs-wii-u-lifetime-console-sales/. Microsoft did what it could to be on top of other game systems but could not keep up with PS4. Xbox is just has a strong sales in marketing making it a cash cow.
As of 2015, the PS4 is globally the top seller in hardware systems. Doing a BCG analysis, I consider them a star. "The industry was down a little bit in May, but Sony's Playstaion 4 gamin console bounced back in a big way" http://venturebeat.com/2015/06/11/may-2015-npd-ps4-tops-console-sales-as-the-witcher-iii-has-strong-debut/.