Cord cutters rejoiced at the introduction of Google's Chromecast, a 2-inch-long dongle that attaches to your TV via HDMI. For just $35, you can stream and control video from your phone, tablet or laptop. You can also cast Web pages via the Chrome browser, and control playback from your Android or iOS device. Videos keep playing even if you open a different app or if your tablet goes to sleep. With apps such as Netflix, YouTube, Hulu Plus and HBO Go on board — and more to come — this is an affordable accessory that can't be ignored.