Ricoh had already done a detachable sensor+lens system, Ricoh GXR, wireless camera system is quite common in the security business. This is basically a similar design to Ricoh GXR plus a wireless control module, or a wireless security camera plus bigger sensor and better lens.
Though, I think maybe is inspire from Ricoh's design, since for security business, such wireless camera tend to be small and easily conceal (hidden cam).
I am not sure how others would think, but to me, this is not unbelievable and not revolutional.
I do wonder how long I can continue use it without recharge the battery, as I definitely won't buy such system if it cannot last long.