The phone is dead. Long live . . . what exactly?

True Ventures co-founder Jon Callaghan predicts that smartphones as we know them will become obsolete within five to ten years, replaced by fundamentally different human-computer interfaces. Callaghan argues that current phones are inefficient and disruptive tools for interacting with digital intelligence, prompting True Ventures to invest heavily in exploring alternative interfaces, both hardware and software. This approach reflects the firm’s history of early bets on transformative technologies like Fitbit, Peloton, and Ring—each representing new, more natural ways for humans to engage with technology. The latest embodiment of this vision is Sandbar, a wearable device worn on the index finger designed to capture and organize thoughts through voice notes, functioning as a “thought companion.” Unlike other wearables focused on health or passive recording, Sandbar aims to meet a core human behavioral need by being an active partner in idea capture, supported by AI and an associated app. True Ventures was drawn not only to the product but also to the founders Mina Fahmi and Kirak Hong, whose background in neural