We have always called my mother the gadget Queen, but I think her choice of windows stunned us all. She chose shutters the like of which I have never come across anywhere else. The windows are double glazed, but with a really big gap between the two layers of glass. The cream metal louvred shutters then descend in the gap when they are operated. I can't say I like them, but they are supposedly not only very good at keeping heat and every scrap of light in and out as necessary, but at keeping burglars out too.
However OH says that the house is so badly built that a wise burglar would just knock a hole through the wall.