Silicon Valley is a young, vibrant place that values youth as a commodity above all else, so what can it do for older people? Can technology offer something for the folks that aren't scooting around on self-balancing skateboards? That's the question Steve Goldbloom and his crew want to ask with this week's episode of mockumentary On the Brink of Greatness. He's taken representatives from five local startups to the Piedmont Gardens retirement community to face the wrath of a shark tank.