Roku rivals Amazon's Fire TV Stick with a blockbuster free upgrade coming soonRoku is fighting back against one of its biggest rivals with the release of a huge free upgrade that brings a swathe of new features to these devices.The free software release, called Roku OS 11.5, will introduce a total of five new features which include changes to the visual experience on the screen along with more detailed information when searching for content and the addition of Bluetooth connectivity allowing owners to watch movies with disturbing the rest of the household.It's a big update from Roku that will certainly help it keep pace with other streaming devices such as the Fire TV Stick, new Fire TV Cube and Apple's latest 4K TV set-top box.Visual Search Results: You can now experience an even more visually appealing way to browse movies and TV shows with the addition of artwork for relevant titles.New Visuals When Searching with Roku Voice: Having thousands of streaming channels in one place may be overwhelming; however, the latest on-screen visuals in Roku OS 11.5, paired with Roku Voice, helps you find exactly what you’re looking for."