You can read more about it on the new steam VR headset. The more interestirinf part I found is the streaming with Wi-Fi 6 because not a lot of devices use it. It doesn’t pass through walls but allows for bigger bandwidth and fast speeds close range.
This is pretty neat: Dynamic Foveated Rendering is a significant algorithmic performance boost for rendering VR apps that uses eye tracking to only bother rendering the area of the scene that your eyes are focused upon.
https://store.bigscreenvr.com/blogs/beyond/dynamic-foveated-rendering-with-bigscreen-beyond-2e
Discussion
It's different. BSB2e has foveated rendering to ease hardware requirements. Steam Frame has foveated streaming to ease streaming bandwidth.