Well, window treatments are home improvements that add value to your home in a number of ways:
Saving Energy
Installing window treatments will help you reduce your heating and cooling bills. Window treatments act as an insulation by adding an additional layer of protection from the elements. For more energy savings use energy efficient window treatments like cellular shades and drapery that are specially designed to insulate and therefore save energy.
Protect your investments
Exquisite artwork and heirloom furniture can easily be ruined if you don't take steps to shield them from the sun. Window treatments offer UV-ray protection that can save your art and furniture. Use sunscreens or Silouette to block the sun's rays while you can still enjoy a view of the outdoors.
Home Staging
Window treatments are one of the most overlooked home improvements that add value to a house; yet it is an essential one. Prospective buyers are turned off by unappealing or even worse inoperable window treatments. On the other hand they get excited when they see pretty window treatments that make them feel at home.
All in all window treatments truly enhance and add value to your home.
Though many people think that curtains and draperies are the same thing they are in fact very different.
Curtains are primarily used as window coverings. They are made from light fabrics like sheers. They are rather casual and are usually window length but they could also be floor length. Since their main purpose is covering windows, curtains are almost always operable.
Draperies, on the other hand, are made from heavier fabrics and are usually lined. They are almost always floor length, which makes them rather formal. Since they are mainly used for decorative purposes, draperies are not always operable.
Curtains can be combined with draperies on one window with the curtain as the window covering and the drapery as the decoration. This combination can also be topped with a valance.
Hope that clears some common confusion.