Oh my gosh I love this, Oz hottness. And I love the blur idea. I like the textures of the circles you put on him gives him that magical mysterious look to him. And it was a good idea to make the brightness on him to make your focus point.
But If I had to say anything I would say that I would have cropped him and the chair out. But it on top of the background scan..(the one you extracted him from) and put more colors maybe blue and some textures, maybe pattern to match the mysterious magical look. Because even though I like your idea I think its a little to simple and you could really make this a great wall if you put some more colors and something else in the background to give him more focus and the wallpaper more creative look. Besides that its a good wall, I like the textures you used, the idea with the blur effect, and the text is so elegant I like how you did that and its got Oz hottness so I love that..hehe.