There is nothing more light, unobtrusive and strong than a large glass window.Able to give an identity to the most minimal of the spaces. It could be a partition, a piece of furniture and an access, at least visual,to another dimension.A stained glass window can be full height; filtering the transition to an outdoor area; simply furnishing.
No matter what exactly your taste is, you will always find a style that reflects you.
The real “curtain wall” is all one with its frame either made of wood or metal - white, black or colored.
There are no specific rules to use it, be only careful it is properly sized to the dimension and type of your space.
Handle with care.