People have done some pretty interesting things with the first Kinect adapter when they connected it to their Windows PC. Microsoft noticed this and has wasted no time in making sure that they can carry on the tradition with a new adapter that allows the much improved Kinect for Xbox One to be connected to your Windows 8 PC.
The $49 adapter allows for connection of the Xbox One Kinect to your PC, but you will need the new second release of the Kinect SDK 2.0 to take advantage of it. The Kinect SDK 2.0 is free for the download and it allows you to access the Kinect from your own programs.
The Kinect for Xbox One was released to be sold separately recently, so the move to release the adapter for PC connection and a new version of the software development kit is really only natural.
You can check out more about the Kinect SDK 2.0 over at Microsoft's website.