(Bloomberg) -- Here’s why you probably want a smartwatch: You can use it to do cool stuff like open doors, pay for coffee, and start cars. Here’s why you probably won’t buy one for another five years or so: There still aren’t many doors, stores, or cars that your smartwatch will work with.
At the IFA electronics show in Berlin this week, Samsung Electronics Co., Lenovo Group and Huawei unveiled updated watches with upgraded features like tap-to-pay and the ability to interact with other devices ranging from your cell phone to your thermostat to your minivan.
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