Fans of the TV show the Big Bang Theory know that everything is better with Buetooth (see the clip below). Evidently the consumer electronics industry agrees and also thinks sensors make everthing better.
The New York Times Bits blog article From the Start, Sensors Rule at CES reports:
It was clear from the beginning that the show would focus heavily on connected devices such as wearables and Bluetooth-enabled toothbrushes with 3-D motion sensors. There was even a smart baby bottle on display ... The unofficial theme seemed to be: Put a sensor in it.
Other examples include a smart belt and a smart ring, which "lets you remotely operate devices with gestures, or by tapping a small button on the side of the ring, like a computer mouse."
I get why I might use a smart ring, but I have no idea why I would want my belt to be "smart".
The other hot area at CES is the connected car. It's covered in the NY Times article and also in Yahoo's The next groundbreaking mobile device: your car.