The VAP4641 is a dual-band two radio extender with four-stream 802.11ac 5 GHz and two-stream 802.11n 2.4 GHz radios. The 5 GHz radio supports MU-MIMO and 160 MHz bandwidth.
Other features include automatic discovery and setup, automatic Wi-Fi configuration distribution, band steering and 802.11k, v and r roaming assistance.
Although positioned as a "mesh" solution, the heart of EasyMesh is the draft Multi-AP spec, which is neither mesh-specific nor particularly focused on mesh.
Arris' announcement included neither price nor availability.