Vega, a new operating system for Amazon’s streaming sticks has led to pushback from consumers. The e-commerce giant seems undeterred. Black, unassuming, about the size of a pack of chewing gum: On the surface, the Fire TV 4K Select stick released in mid-October looks just like any other streaming device made by Amazon. Plug it into your TV, and you’ll be greeted by Amazon’s tried-and-true living room interface, complete with icons for popular streaming apps like Netflix, Disney+ and Prime Video.