Straight from WayForward themselves, the update, which includes 5 new levels, will be coming this Thursday to everyone who owns or downloads the game. Here's the full list of updates:
5 all new bonus levels Enhanced stereoscopic effect to all previous levels By popular request, a “retry” button for dedicated speed runners
Though we already knew it was coming, the retry button will definitely be helpful for those that want to 100% the game. Curious to see what the enhanced 3D will look like as it was already a very clean and sharp 3D effect.