If the term "smart sound bar" seems unusual, that's because it's brand new. TCL just announced the first in a new class of gadgets that act a little bit like a smart speaker and a little bit like a remote control that's powered by your voice. As the name implies, the new TCL Roku Smart Sound Bar is powered by the newly announced Roku Entertainment Assistant. Suddenly, everybody's favourite set-top box company does a lot more than make set-top boxes.