That depends. If the cost of production can be reduced with mass production, or the efficiency increased, so that it becomes energy positive, if the energy sou

That depends. If the cost of production can be reduced with mass production, or the efficiency increased, so that it becomes energy positive, if the energy source required to make these windows is variable, for example by using any thermal energy source, or if it displaces the energy required to make normal windows, it's worth continuing to research in that direction.