Amazon has jumped into the increasingly crowded world of set-top boxes with the launch of Fire TV, a slim, flat $99 box that brings videos, music and games to TVs. In introducing the product, Amazon VP Peter Larsen listed all of the unpopular qualities of rival products, such as the Roku, Apple TV and Chromecast. Fire TV solves all of those problems, Larsen said, with an accurate voice-activated search function, a powerful central processor, a large helping of RAM and lots of available apps.