Is everything included with the Roku Streaming Soundbar to connect a non ARC HDMI TV?
My older Sony has a Digital Audio Out (Optical) post along side the HDMI posts.
Yes a regular hdmi input will allow for both audio & video from the built-in channels on the Streambar to go to the tv and work fine. If you want sound from other devices connected to yout tv to reach the streambar you would need to use the optical output of the tv in addition to the hdmi cable.