Alphabet's Verily isn't done finding new places for its health-oriented wearable tech. CNBC sources claim the firm has developed prototype smart shoes that measure movement and weight, and could detect when you've fallen -- not a novel concept, but still relatively rare. These wouldn't be fitness shoes, then. Instead, they could track rapid weight gain (a sign of congestive heart failure) or send an alert if you take a tumble to the ground. That last part could be particularly helpful for people who have mobility issues but still want a degree of independence.