Diablo III: Reaper of Souls

It was only a 1:40 video showing small clips of the features. I'll recap it.

First thing shown was the new UI. On the left pane were Campaign Mode and Adventure Mode, Campaign being the standard Story Mode we play through today.

• Adventure Mode
  
• Map of the Act is given (you can find pictures of these maps in past datamining for Act I~IV, no Act V yet afaik)
  
• All waypoints unlocked
  
• Select the area on the map to waypoint to it
  
• Bounties are given for a specific monster in that map (in the video, it was a purple), it's possible there are other objectives than just ganking one thing
  
• Bounties are shown when you mouse over the area name in the map, before clicking it to waypoint
  
• Complete the bounty for EXP and Gold like a quest (video shows 350k exp, 130k gold)
  
• Nephalem Rift
  
• Nephalem Obelisk near the Tome of Identify
  
• Open a portal (there's an item requirement which I believe is a random drop, possibly from bosses)
  
• Video shows Fields of Misery style map with those stupid trees, but with one of those hammer armed colossus Act IV monsters as a boss.
  
• Clans
  
• A short look at the Clan UI, sorting members in the list etc
  
• Showed a message feed
  
• Mystic
  
• Presumably an ilvl70 (73?) Azurewrath put up
  
• Stats to reroll were shown above
  
• Rerolled the 918 VIT
  
• Got 916 Vit, 7xx Vit, Cooldowns -8%
  
• Cost ~150k Gold
  
• Transmog showed a cost of 500 gold for basic item styles, didn't see any Legendary transmog
  

Otherwise, there was just some generic Crusader showing off, with its sword hurricane skill prominently being spammed in every cut.