What UI changes are there?
From the UI section of the patch notes:
• Added the number of specialists working a tile.
• Added some additional icons for espionage, promotions, etc.
• Added additional Civilopedia shortcuts, including right clicking a unit portrait.
• Added the signature to the diplomacy action view/deal view so that we can differentiate between duplicate players. Also added multiplayer screenname in diplomacy.
• Added Trade Route yields to the Reports screen.
• Added City Center to the City Breakdown panel.
• Added rewards and consequences to mission completed popups.
• Updated the leader-chooser when beginning a new game.
• Updated the end game Victory screen.
• Updated the multiplayer staging room.
• Updated city banners.
• Updated Espionage mission chooser flow.
• Updated to display what cities are getting amenities from each resource.
• Changed resource icon backings to reflect the type of resource it is.
• Auto-scroll to the first Great Person that can be claimed.
• Improved search functionality in the Civilopedia.
• Removed Barbarian data from player replay graphs.
• ESC now closes the Tech, Civic, and Eureka popups.
• When loading a game, the era blurb will be the current era of the saved game, rather than the starting era of the game.
You will find full Windows patch notes here:
http://steamcommunity.com/games/289070/announcements/detail/646658987742411203