A piece is much more than a "brushed background with some effects." A piece, any piece, requires a proper design and balance.
I think the foundation for this wallpaper is right. However, it being a wallpaper, you must take into account several things - most crucial is the fact that people use icons, and those would be hard to view on such a background.
Also, the colors in this piece (mainly that orange) are really bright. If I was to use this as my background, I'd probably get a seizure every time I looked at it ;P