Are there channels that allow me to watch live or local TV?
Yes, there are live broadcast channels like ABC, NBC, CBS, HGTV and Fox. In addition, some cable/satellite companies are creating Roku streaming channels that allow you to access all or most of the channels you get through your cable subscription without having a separate cable box (e.g. Spectrum TV, Comcast Xfinity, DIRECTV NOW).
If you have Roku TV, you can also connect an antenna to access live and local broadcast TV over the air.
It uses the word "also" in front of "connect an antenna" If we do not have an antenna nor good reception, are broadcast channels such as "ABC, NBC, CBS, HGTV and Fox" provided via streaming?