BRD is the actual owner of the entire netKar PRO codebase and no public external plugin interface to get data out of the sim is available. AC is 100% KS's codebase and an public external plugin interface will be available.. actually, more than one, there are 3-4 different ways to get realtime data out from AC. This will make it VERY simple for any hardware manufacturer to develop a plugin for AC in no time.
I hope this clarify the situation.
ASSETTO CORSA MOTION PLUGIN FOR X-SIM3 CAN BE FOUND HERE
Copy all content of the plugin folder in archive to the plugin folder of X-Sim. Also do copy the game wizard script.
Then autosearch and the game will be added to the game list. The first plugin (assetto corsa) must be checked.
TUTORIAL: HOW TO MAKE PLUGIN WORK IN X-SIM3
MEMBER RAFAEL DRIVING ASSETTO CORSA WITH MOTION
Tech Preview demo is released for people who own NetkarPRO. Those who are eager to try that, there is special offer for NetkarPRO, it cost 4,99 € at their page http://www.netkar-pro.com, special offer until March 1st.
Some footage of Tech Preview