He went on, "The more platforms we take on, the more work it ultimately becomes, and what we don't want is to compromise the core experience on any platforms. We have a lot of people who play on PCs. We have a lot of appetite to build that experience. We haven't announced it yet, but we're looking forward to talking more about that kind of stuff in the future."
Source via CVG
This is great news as Destiny already looks amazing on the consoles, and bringing it to the PC would really let it shine. In case you missed it, here is the 6 minute Destiny gameplay trailer from E3 2013: (make sure you watch it in 720p)