Totally possible, in fact this is exactly what I do.
I don't actually watch TV (weird I know)...
I have my television hooked to my computer via HDMI.
I usually use the "normal" not minimized or maximized window of a programs so that I can use more than one at a time without having to change tabs.
This works seamlessly.
So you can write lyrics on Word or Notepad while BIAB is open...
Makes it a lot easier.
Also, you can use the magnifier feature so that you can do this from across the room... HA!