If you like the Android TV ecosystem, NVIDIA's Shield TV is a great streaming option if you also want something a bit more powerful than a standard Chromecast. It's an even more compelling pick now that it's down to $129 in an early Black Friday sale -- that's an all-time-low price that has come around before, but not very often. This streaming device earned a spot in our holiday gift guide this year for being one of the more powerful dongles you can get thanks to NVIDIA's Tegra X1 processor. The company claims this chip is 25 percent faster than the X1 that came before it, and in the Shield TV, it's put to good use by helping power an AI-powered HD to 4K upscaler. That means lower-res footage will more closely resemble 4K footage when streamed with the Shield TV.