User blog comment:Matt Hadick/Make Your Voice Heard and Answer These Destiny Questions/@comment-71.231.88.50-20140905173939/@comment-24987878-20140910172245

To date Bungie has stated that they do not want to explore many more platforms outside of the initial launch selection as it would "spread their existing resources too thin".

That said given the history of prior game releases by them I can't see why it wouldn't eventually migrate to PC.