This is in evaluation. Details could change or may not happen. Details i have so far:
1) Google wants to take a stab at Apples margins and wants tighter control over system.
2) They are not happy with hal/driver behavior and also proprietary moduled. Buying would give them control.
3) Chips could be used for Waymo car to car communication, apart from Pixel.
4) Pixel will release with newest h/w. Reference system including s/w will be given to others later.
5) QC might be maintained as a private subsidiary like Youtube. QC owners will be happy with this arrangement.
6) Details on licensing or NXP not available yet. Will post once available.
Again, this could be a rumor, may not happen, dont get hopes too high.