You can now sign up to try a $2,000 AI headband that a startup says will help control your dreams

• Prophetic opened its bookings for users to test its Halo: a headband that aims to control dreaming. 
• The startup claims the Halo can shoot signals to the user's brain when a wearer enters REM sleep. 
• But the company hasn't provided tangible proof yet that their dream machine works.

A neural-tech startup is trying to use AI to make something like "Inception" a reality.

The dream-inducing device sounds like a sci-fi gadget — though it's not clear whether the dream machine works outside of the lab.