NextSense's EEG-equipped wireless earbuds are an intriguing idea, but I'm not sure if sleep-tracking can save me from constant tiredness. Gizmodo’s The Next Interface is a weekly series that explores the exciting—and perplexing—world of wearables in all of its evolving form factors. From fitness bands and smartwatches that track your heart rate to wireless earbuds and headbands that re... [13302 chars]
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