FAVI Smartstick keyboard controller mentioned in The New York Times review of Sceptre Speaker SoundBar SB301523.
One hitch in the execution is the built-in Android interface, which moves at a glacial pace. Even worse is trying to navigate the web using the included standard remote. Because you have to enter a lot of text when looking for videos or using apps, you really need a keyboard. I tried it with a Favi SmartStick Keyboard Controller, which was a vast improvement, but would add $40 to the cost of the system.
Read the full Sceptre Speaker SoundBar review at nytimes.com.