If a smart home is truly smart, it should know who’s inside it. That’s the argument Netatmo makes with its new Welcome camera, promising Dropcam-style streaming video but combined with facial-recognition. At $199 it matches Nest Cam’s sticker, but without the need to cough up for the cloud if you want to look back through captured footage, and Netatmo says its person-spotting skills should cut the number of false-alarms down, too. I put on my most welcoming expression to
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