Amazon Fire TV review: The 4K box to beat (for Prime subscribers, at least)

Amazon’s 2015 Fire TV isn’t so much a brand-new product as it is a touch-up on the original. The new Fire TV has a faster processor and supports the latest 802.11ac Wi-Fi standard, and it now streams Amazon and Netflix videos in 4K Ultra HD. The optical audio output is gone, but there’s now a MicroSD card