As it appears to be wireless I would imagine the latency between head movement to camera movement and then video capture to video output would likely be enough to make users feel ill.
The camera movement latency is probably quite noticeable. With a brushless gimbal this could be greatly reduced. The 5.8 GHz video transmission setup is widely used for FPV flying, and its latency is negligible.
Wireless 2.4ghz radio latency is measured in milliseconds which is quick enough not to notice. Latency also depends on how quick the gimbal servos are but that too may be quick enough.
