Those companies or users that rely on or are committed to the original Kinect sensor will need to contact Microsoft as soon as possible to arrange for the purchase of additional units because no additional units are being manufactured going forward.
Depending on the situation it might just be better to port your application over to use the second generation Kinect with your Windows applications. Ok course that is a bit easier said than done due to the more advanced nature of the new v2 Kinect.
The news really isn’t that much of a surprised to Kinect for Windows users as Microsoft released the v2 Kinect for Windows along with the new 2.0 SDK for Kinect for Windows back in October 2014, so you could really guess what was next in the future.