We recently purchased a Roku to watch Netflix on our main TV rather than plug in the laptop.
The thing is, my home audio receiver is nearly 20 years old, so it predates HDMI connects. This has not been a problem until now. So, I found a converter on Amazon that will take the HDMI and split it to component video and optical audio. The converter arrived today, but the new optical cable is still on it's way.
I'm hoping this allows me to run the Roku through my receiver, so I don't have to keep switching TV inputs. But we will see.