Following Dr. Brown’s instructions, Marty heads to Café 80s where the waitstaff consists of television screens mounted on articulated arms which are suspended from the ceiling, allowing them to reach anyplace in the café. Each screen has a shelf on which small items can be delivered to a patron. Each screen features a different celebrity from the 1980s, rendered as a computer talking head and done in a jittery Max Headroom style.
Patrons speak directly to the figure on screen as if it was a human server. With perfect speech recognition, the figures engage in dialogue with the customer to answer questions and take orders. When Marty orders a Pepsi, the waiterbot turns away to attend to other customers, and a small cylinder rises from the Pepsi-branded table in front of him containing a Pepsi Perfect. When Marty removes the soda, the delivery cylinder descends quickly back into the table with a whoosh.
Sure. This is functional as a robotic cafe. The limitations of the cafe are apparent when a violent gang intrudes, and the cafe does nothing to help protect its customers or itself, not even call human officers to intervene.