the blog article says nothing about the 180° hand recognition. However - it's in their current hand motion VR tech description on the main website.
The hand and limb recognition should always be wider than the HMD FoV so the rendering doesn't need to pop in or use other distracting effects when moving arms towards the edge and back.
I hope it will not become irritating when there are 20° missing compared to the Pimax 8k FoV.
Unfortunately Leap Motion in VR is still a prototyping gadget with demos only, I really enjoyed those using the Rift. AFAIK there is 0 support in commercial VR software today.