Yes! There's an official video about it on The Division YouTube channel. They don't go in-depth, but they do talk about it. It was also talked about in some of the E3 and other convention videos.
I can't recall which video on the official page it is, so here's a fan that's brought together of the information concerning bases and safe houses.
https://www.youtube.com/watch?v=zPZRu7sl4QQ
Someone asked if there were going to be strikes and raids like in Destiny, and while they haven't come out confirm it as such, they did mention multi-squad end-game activities that weren't strictly PvP. For clarification, squads are up to 4 players.
From what I've seen, there's a lot to do in the game, quest wise. Sure, there's the story, but there's more stuff along the lines of claiming territory and crafting. There's also a fair bit of customization to be done on both your character and weapon.