I would move the table and chairs a few inches more to the right so they were centered on the wall. A large art work on that wall, with colors that marry the color coordinates in the room, would be lovely.

May be some gallery with art or photos/family photos. I would paint your dining chairs in black high gloss .

Have you used upholstered chairs before? and do you like them? Make sure you like them, I find them very difficult to move to get into and out of at the table. I prefer a wooden chair that can easily be grasped at the top.

I like the gallery wall that celerygirl posted. And then add some plants in the living room.