Wi-Fi technology doesn’t have a traditional format of version numbers. The next version of WiFi standard, 802.11ax, will use a simpler naming scheme and will be called WiFi 6. This new straightforward approach will make it easy for users to recognize which WiFi version their devices support and run, helping them to keep their devices up-to-date with the latest advanced WiFi capabilities. Wi-fi 6 will offer higher data rates, increased capacity, good performance and improved power efficiency, making it perfect choice for smart home and IoT uses.
Source: https://thehackernews.com/2018/10/wifi-version-6.html