With day 3 of The International 10's group stage wrapped up and one team already mathematically eliminated, SteamDB has spotted an update for the game: https://steamdb.info/app/570/history/
Size is ~75 MB (with Workshop Tools installed). More info will be edited in when available.
Clouds in the dashboard/home page's background will now rotate the same way as what you see when The International titles are shown on stream during startup/between games/end of day (clockwise)