NEW YORK — While e-commerce sales figures continue their steady climb, even Birchbox chief executive officer Katia Beauchamp, whose core business is a digital subscription service for beauty products, doesn’t foresee a future in which consumers robotically shop from their sofas. “I don’t think anyone wants to live in a world like ‘ Wall-E,’ where all of our discretionary, free time is screen time,” Beauchamp said at an Advertising Week panel titled “The Third Screen: Innovating Retail…