This impossibly cheap flash-drive-size dongle fits into your TV's HDMI port, syncs up to your WiFi network, and turns any HDTV, however non-smart, into a Netflix-streaming machine. And that's not all. The Chromecast – which sold out its first run practically overnight – can also play YouTube and Google Play videos on the big screen, using your phone, tablet, or laptop as a remote. [$35; google.com]
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