UPDATE: Creator Sean Murray officially announced the delay via the PlayStation blog, writing:
The game really has come together, and it’s such an incredible relief. As we sit an play it now, and as I watch playtesters every day, I can finally let myself get excited. We’re actually doing this.
However, as we approached our final deadlines, we realized that some key moments needed extra polish to bring them up to our standards. I have had to make the tough choice to delay the game for a few weeks to allow us to deliver something special.