Hello dear,
Wi-Fi 6 will bring many improvements to the WLAN as we know:

High Bandwidth
Wi-Fi 6 achieves a
theoretical speed of 9.6 Gbit/s at 160 MHz channel bandwidth
Low Latency
OFDMA and BSS coloring technologies introduced in Wi-Fi 6 reduce latency to as
low as 20 ms.
High Concurrency
Wi-Fi 6 introduces multi-user technologies, such as OFDMA and UL MU-MIMO,
to improve spectrum utilization.
Energy-Saving
Wi-Fi 6 uses TWT technology to save power by waking terminals up on demand
If you'd like to know more about it I really recommend to subscirbe to this collection: Wi-Fi 6
Hope is useful!