The theater held a palpable charge the night “Anemone” premiered late last month at the New York Film Festival. When the credits ended, the audience sat seemingly in stunned silence. Then a spotlight swept toward the balcony, and there stood the film’s star, Daniel Day-Lewis, alongside his wife, filmmaker Rebecca Miller, and their son Ronan Day-Lewis — director of “Anemone.” The crowd erupted — elated to witness one of the greatest actors of our time step out of retirement to embody a role in his son’s directorial debut. That moment carried a reminder of what cinema truly is: the human presence of artists who risk themselves before us.

That same week brought a very different kind of unveiling. Particle6, a U.K.-based company, introduced Tilly Norwood, the world’s first AI “actor,” which h

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