We recently had some block out blinds and pelmets installed in our kitchen/meals/family area. We previously didn't have blinds as we don't need them for privacy but I decided to get them to a) finish off the room, and more importantly b) to help with insulation. In winter you can really feel the cold through the windows and the heater works overtime which costs $$$ so hopefully these will help.
It was hard to get a picture but here they are.
We have two of these windows side by side but I only took a pic of one.