While I was looking into this device and its claims, I thought about what it would take to really build a helmet rebreather. If you moved the counter lung to the outside of the helmet, you could place a 6 liter counter lung in the system and free up room inside the helmet for three 6 cubic foot bottles, computer modules, batteries and two beer cans scrubbers along the jaw line.
This counter lung would be covered in a corrugated material so it could stretch and contract like counter lung hoses on the old Eoba rebreather. However, trying to market a device with a big, buoyant, pulsating brain on it would be a substantial challenge. As I looked closer at the design, I realized that the air in the counter lung would not spread out to fill it like a brain. The air space would rise to the top of the counter lung at the top of the helmet, hanging upward, probably separating into two bubbles to follow the seam in the counter lung. It would be more like a scrotum than a brain. No one's going to show a ball sack, helmet rebreather at DEMA.
But still, I want to see the next big thing, I support technological innovation in our sport. If the diver had been swimming around that demo tank with a pulsing scrotum on his head when the helmet suddenly exploded from a violent potassium reaction, I would applaud their aspirations (from a distance).