There seems to be two opposing opinions on this one on SW. Those that are certain Destiny will never come to PC, and those that are positive it will.
Personally, I think it will be announced for PC after around six months of console exclusivity. Why? It's an Activision multiplatform game, and it make sense for them to put it out for PC as well sinec they want to make money. There is nothing preventing this, so I'm pretty sure it will happen at some point. I'm guessing we will hear an announcement early next year.
If you don't think it will come to PC - what convinced you of this?