HOW. FREAKING. GORGEOUS?!!?
A Big bold patterned wallpaper on the wall and on the chair, Delicious! Use a chunk of the wallpaper to make a stencil, t-shirt paint, and a stiff bristle brush from the local art store will work well to transfer the pattern via stencil onto the fabric. Once dry, Iron to set the paint and reupholster that chair bay-bee.
Sit back and think about how sexy your new space is.