https://www.cnet.com/news/asus-rt-ax88u-802-11ax-router-to-be-available-mid-october/

The router will also help your devices last longer. It uses a new tech called Target Wake Time (TWT) to schedule transmissions, letting devices sleep longer before they're woken up to receive wireless packets. 

Other features include Asus AiMesh, letting you use the router as part of a mesh network with other Asus routers that support this feature, including upcoming 802.11ax routers such as its AiMesh AX6100, which are dedicated mesh devices like the Linksys Velop or the Netgear Orbi.