Destiny 1.0.2 Patch Details

Daily Heroics, Weekly Heroics, and Vanguard: Tiger Playlist activities will include Rare and Legendary Engrams in addition to their existing rewards
Bungie has announced that a new update for Destiny will go live next week and will include several changes to the Cryptarch and Engram experience. These changes guarantee that Engrams will always decode into items at or above the quality of an engram.