The first real 5G specification has officially been completed. The 3GPP has indeed officially signed off on the first specification for 5G (specifically, the 5G NR standard) at a meeting in Lisbon, Portugal on December 20th, 2017.
The Non-Standalone (NSA) 5G New Radio (NR) specification will form the basis of commercial 5G products.
The Standalone version is scheduled for June 2018.
Click here to read the interview (In French only).