Smart belt loosens buckle when you've eaten too much

 This smart belt automatically adjusts itself throughout the day, depending on how much you've eaten and how much exercise you've done to compensate.

It also keeps track of your overall health, and nudges you when you've been sitting for too long. French startup Emiota unveiled the smart fitness belt on Sunday at CES.
Given that the size of your waistline is a key indicator of health, the Belty — which comes equipped with small sensors, an accelerator and gyroscope — knows just how much you've been moving and whether you need to be more active.
The belt connects with an app that charts the data it collects throughout the day. It pushes out feedback and suggestions that correspond to how the belt adjusts in real time.
Inside the Belty is a collection of motors that expand and retract based on waist size — so it's also something you could buy once and keep over the years.
It's hard to tell at this point if the Belty is just a gimmick or could actually be useful in everyday life. The prototype is based of clunky metal, something that would likely feel heavy around the waist.
The price point is still in question, too. A Belty representative told Mashable it is a "high-end product" with likely a luxury price tag. The company hasn't yet announced when it will hit the market.Source: Mashable