Your wallpaper might be the best feature for your dressing room and just let it show right through a clear acrylic dressing table.Or you could continue with your touches of gold on a new vanity or by using a bit of gold leaf on an antique one. Add a gold chair to a rosewood vanity to continue with your bedroom look. My personal favorite is #4 ,5 & 6 below. Love the curves and a desk will work too.

Going with the theme your are trying to achieve, I would add a black leather ottoman to replace he white table. The built in shelf I would remove and sheetrock over it or paint in a matte finish black. Before you paint in black be sure your have accessories such as silver or reds to put in that space to set off the black background. You can put a series of pictures with silver frames or art objects of silver , red or combination. I love your table and chairs.

Perhaps a large round table might mean a rug is not at all necessary. It could be a metal tray table, or carved wood like Rebecca Mitchell Interiors illustrates. Ideas also to consider, using multiple tables can be found at http://www.houzz.com/multiple-coffee-tables. I also agree with comments above that some color is needed on the walls. You could then hang round mirrors, or an unusual curved shape like RMI shows above.

There are lots of nice cordless lamps. What if you take the picture to a store that just sells lighting, and see if they have something similar in their catalogs? It would be expensive but maybe worth it if you love having them be the first thing you see when you come in the door.