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.

It's not the *desk* that needs to be interactive and fun; try ditching the chairs and getting stability/yoga balls :) http://www.philly.com/philly/health/kidshealth/Teachers_ditch_student_desk_chairs_for_yoga_balls_.html http://www.huffingtonpost.com/2012/11/28/exercise-ball-classroom-desk-chair_n_2206743.html http://www.kshb.com/dpp/news/education/kindergarten-classroom-has-no-chairs http://newadventuresinfirstgrade.blogspot.ch/2011/09/where-it-happens-wednesday.html

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.

I'd suggest dark red curtains if you need curtains at all -- the windows are beautiful as they are, and I'm not sure whether some kind of blind might not give you the ability to darken the room when you want to. On the wall, if you are real fans of any movies or TV shows, three big posters would be fun. Otherwise, I would still suggest using three pieces of art there of that size, all equal in size and somehow relating to each other. Three floral works, or three works in the same style, perhaps. I think a large plain textured rug in a light neutral from one of the cushion fabrics would tie the space together well. You might also consider a lovely low coffee table on the rug to lay out your snacks and drinks for serious media nights.