Although not a tangible as what you suggest, there already is a trend in modern board gaming to have app-assisted games, usually to manage hidden state and real

Although not a tangible as what you suggest, there already is a trend in modern board gaming to have app-assisted games, usually to manage hidden state and real-time elements, and primarily in cooperative games. A couple examples are Space Alert, X-COM and Mansions of Madness 2e.