Hello, I want to suggest the following enhancements:

1) Add Kinnect support under Win32. Cross-platform FindOpenNI.cmake [[FindOpenNI]].cmake could be taken from PCL.

2) Support of playing ONI-files (or may be even recording??). This file fully emulates connected device.

3) Currently highgui uses workaraund of OpenNI [[OpenNI]] bug in past:
it creates tmp file and stores XML and passes it to OpenNI. [[OpenNI]]. Currently this cam be done without XML config. License key can be set by XnContext::setLicense. [[XnContext]]::setLicense.