Playstation Store is offering the Tron Run/r Dynamic Theme (PS4) for Free exclusively for Playstation Plus Members.
Note, you must be a PSN+ Member to get this theme for free, more info here.
https://store.playstation.com/#!/en-us/games/themes/tron-run-r-dynamic-theme/cid=UP1082-CUSA02346_00-UTH0000000007136