I could see some type of crafting down the road. Armorsmith, Weaponsmith. I wouldn't mind seeing that in the future. Not sure what else you could add to a shooter though? Maybe some housing? I don't know, but i'm excited to see how it goes though.
I guess that's what I'm afraid of.. As a shooter I'm sure it's going to be great. But even shooters get stale over 10 years.
And I'm not saying that WoW didn't get stale over 10 years.. but I can't say that I ever ran out of stuff to do there either. I can put in the same number of hours in any shooter and finish it, even the multiplayer.
It will have new content, I played wow for 5 years or so. I think it will be the same thing. Dungeons, Story, Raids, PvP, Collections and Exploration will also prolly be in Destiny. Crafting maybe? Thats a lot of stuff and if they keeping adding to all of that with expansions it should keep people playing or atleast coming back.
I guess it depends on how much time you are putting into the game. If your playing tons of hours a week you would get bored with anything. I have other games I'm waiting on, so I won't be just full force on Destiny. Hope I don't get bored with it.