It appears that the web page for the update went up too early. People are reporting seeing features like procedural missions, trade/economy improvements, joint exploration, and more.
An official date for the patch seems like it will be tomorrow, 8/11/17
EDIT 2: Pics are leaking
Hello Games just released an email to all followers of the huge ARG they just ran
This will be the third free content update for the game!
Past two updates (thx legacyzero):
Owning and building bases in freighters
Graphics and bells n wistles upgrade
Refreshed universe with improved procedural tech.
PATH FINDER: https://www.nomanssky.com/pathfinder-update/
3 new ground vehicles
PS4 Pro patch, graphics upgrades, unlocked framerate with PS4jr, and 1800p on Pro mode
Base sharing (If somebody finds your base, they will see what you built
Own multiple ships
New shops and traders
Skipping milestones, and slow letterbox junk
Very much looking forward to the update! The game is pretty damn alright now and a story will definitely be a nice touch to make the game feel well, like more of a game :)