The new version of the currently named TKinect library has yet to be named, but you will be able to make use of both these devices on Windows and Linux. It is rumoured that ASUS will be adding Mac OS X support for the Xtion Pro Live so support for Macs will be added as well.
Support for Lazarus will be added in the as well. It's not clear if the new version will support Free Pascal it's self alone. Delphi is currently supported.
ASUS Xtion Pro Live Demo Video
Interestingly enough the technical abilities of the Kinect for Windows from the current Kinect for XBox 360 have been reported to be quite different. It would be interesting to know more as to why Microsoft made that choice. Could they have used different hardware or is this just a stunt to promote the XBox 360?
Microsoft Kinect for Windows will be available on Feburary 1st, 2012.
David Abraham explains Kinect for Windows
Showcase of other Possibilities of the Technology