When I attended IDF 2014 in San Francisco, one of the most prominently hyped products was the then-forthcoming BioSport™ earbud set with integrated heart rate monitor. There was an impressively large and aesthetically awesome area of the Moscone Center dedicated to it. The headphones, produced by SMS Audio, were featured in the keynote and even Google co-founder Sergey Brin made a random appearance to participate in some yoga as part of its promotion.
For attendees, the coolest part came during the keynote when it was announced we'd all be getting these $150 headphones for free. Months passed with no word, but right before the Christmas holiday a mysterious package appeared on my doorstep. Inside contained the message: "As announced during Brian Krzanich's opening Keynote, and as a thank you for attending IDF14, you are receiving your own pair of SMS Audio BioSport In-Ear Headphones, powered by Intel. The in-ear headphones include a heart rate monitor so you can listen to music and monitor your heart rate at the same time."