It also means that you will run into players from the PC and Xbox One versions of the game, populating your world.
This means that you can play with your friends on PC, then log in from Xbox One, and continue playing with those same friends.
Sea of Thieves is due out on Windows 10 PCs and Xbox One in Spring 2018.
At Gamescom, Rare confirmed something that I didn’t realize hadn’t been officially confirmed already- that their upcoming shared world pirate adventure game, Sea of Thieves, will feature full, seamless cross platform play between the Xbox One and Windows 10 versions of the game.