Place an abstract art or an paranoramic photo witch is 2 meters wide. And at both sides a candle holder. Maybe tat will make some nice atmosphere in the room. I would do a nice paranoramic photo of an lake or such sort. Because that opens up the room. And because i see so mutch white you should choose an warm colour, like an sunset orange.

I hop this helped you out!

One large piece of art helps with the contemporary feel of the room.

Some sort of wall sculpture would suit this room's style. [houzz=];[houzz=];[houzz=];

Is there room for a narrow console to be centered with the table and then find a colorful piece of art to center over the console?

Giant painting

Large black and white photography of a scene special to you would be dramatic.

A white on white painting would look stunning.
Check my art work on Houzz for ideas.
Eugenia Pardue.

You have a beautiful room! I love it! So far the attention is drawn to your dining table and the items you've on the glass shelves. I guess your style is modern with clean lines, somewhat minimalistic, and you have achieved it. I would leave as is. Less is more.
I agree with haleydaniels comment "The key to having the room look right really comes down to liking how it looks. When you like a room how it looks, it's finished.
If you really want to put something on the wall something white on white would look great.

Be bold...wallpaper it

Three pieces of artwork same size and same theme; subtle abstract trees or landscape, subtle colors to give a dreamy feel.