I think you can do some amazing things in the space!

First, that wall really is the focal point in the room. Find something that really anchors it whether it be built in shelving and consider having the television built-in to the centre of it all. Once you've anchored that wall with a large piece of furniture, a collection of art both 2d and 3d, photos and accessories would be since touch. Whatever you do make sure you play up on the architectural features of the room.

I would check to see what IKEA has....they have some combinations for shelving and cabinetry to incorporate your tv on the wall. Totally agree with Dlyte Interior...
BESTA may be an option...they have lots of color options and configurations.
This is a great option of you want it to be removeable....if not, built ins would be beautiful. Meet with a good fine carpenter. You could even incorporate an electric or ventless fireplace into that wall! :)