After reading the full article in the digital edition of the new Game Informer, I can't wait for TTK to drop! Here are some things that jumped out at me:
Exploring Phobos (Mars moon).
Gunsmith Reputation ranks/Armsday rewards.
Equipable/Changeable Emotes.
Interesting new Exotic Weapons (Sleeper Simulant, No Time to Explain shown).
Clear and Accessible Leveling system to 40.
Twice the Campaign Missions.
Ghost Shells with added Perks.
You pledge allegiance to factions vs wear gear.
Outfitter and Factions store shaders/gear you've purchased so you don't use vault space.
3 new Crucible modes (at least that many).
Ability to hold more bounties.
And this isn't even touching the details for the actual Taken King and his Dreadnaught. I'm already planning which items I'm going to hang onto for 2.0 (Shadow Price and Another NitC). What will you keep?