The new Amazon Fire TV Stick 4K Select is a media streamer that plugs into the HDMI port of your TV to let you stream content from Amazon, Netflix, and other media sources. But there are two things that really make this new media streamer stand out from Amazon’s earlier models. Available for pre-order for $40, it’s the company’s most affordable 4K streamer to date. And it’s the first to ship with Vega OS instead of a version of Fire OS based on Android. But over the past few years the company has been developing a new operating system called Vega.