Neptune, a new startup launching today, believes the era of the smartphone is headed towards an end. “The current wearables space is best summarized as a master/slave relationship,” says Simon Tian, Neptune’s boyish founder, who is all of 20 years old. In his formulation, the phone is the master, and all wearables are the slaves, simply borrowing from the power and capabilities of the phone. “The smart watch actually just proves you’re also a slave to your phone. Imagine when it’s out of sight. You freak out!” Tian says.