Headboard is maybe the most important thing on the appearence of your bed. That means that if your bed is very simple, you can make a major change just by changing the headboard , or just by add some fabric, leather or something else on it. If you like your bed but it looks too simple or old fashion, you could try to make a change to the headboard.
The most easy and cheap idea, is to cover it with the aprropriate fabric that suits to your bed and the entire bedroom. For more luxury changes I would suggest leather headboards. There are also many other kind of materials you can use , but this allways depends to your bedroom’s interior design. For classic bedrooms my advice would be to use leather or classic fabric. For modern bedrooms you can use dark fabric or leather and you could also add some inox lines to make it more impressive.