Research firm IDC said Tuesday that it expected wearables shipments to grow 15.1% this year, led by strong growth in basic trackers as well as continued growth in smartwatches. IDC sees wearables shipments growing at a 13.4% annual rate through 2022, however, as basic trackers grow less popular but watches maintain momentum. "The addition of cellular connectivity is also starting to resonate with early adopters and looking ahead the emergence of new use cases like music streaming or additional health sensors will make cellular connectivity pivotal to the success of the smartwatch," IDC senior research analyst Jitesh Ubrani said in a release. Apple Inc. 
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