Maybe a nice rectangular artwork the same width of the cabinet above the TV or an interesting fabric wall hanging to match your decor...or you could have, again above the TV, a timber shelf that matches the timber in the cabinet or that in the floor...or that is painted to match the wall colour, having an ornamental front that would hide the power points....Did that explain the shelf? I'd do you a sketch if I knew how to upload it. Unless you are a minimalist you could have one or several interesting objects d'art on the shelf (no flower vases with water) or some books with classy-looking spines in a row between ornamental or plaiin book ends.

Its just a bit too white, a darker feature color would be nice to give it some definition then you could add the shelves for xtra storage

Hi Chris, Lovely house! Art is always a such a personal choice but large scale artworks are our speciality and we agree that's what your space needs - something with impact. I'm attaching a link to the client review of a project we did in a similar setting which worked really well. http://www.houzz.com.au/viewReview/297646/signarture-review That piece was a 800H x 2400L perspex artwork but we create all our artworks bespoke, in whatever dimensions / colour / medium works best for your space. You'll find triptych versions of this design in our online gallery which would also work well - and can cover an even greater span. This link will illustrate the options. http://www.signarture.com.au/collections/treescape-perspex-artworks/products/tree-perspex-art-burrawang-magenta-triptych We have many other designs, so feel free to browse our collections, and if you see something you love, don't hesitate to reach out.

I'd go for a sepia toned picture in a dark frame -- as close as you can match to your bed and cabinets -- get a photo you like ( even a modern one , a personal family pic or a sunset or whatever takes your fancy ) , get it sepia toned and printed around 40x 50cm , have the frame at least 10cm wider ( with matt white card infill ) so it all looks period . You can even do smaller ones for the other walls . I know you want something you've made yourself , and I can understand that , but I'd reinforce Dr Retros comment that it could easily detract from the aestethic .