Get some beautiful shower curtains in warm tones and a comfy rug to match. Both should have a lot of texture, the shower curtain, a large pattern. Something Marimeko perhaps. Change the knobs to chrome to match the sink faucets. If you can, consider painting the white wall in a coordinating color. Be careful not to clash with the "peachy gold" tile walls.

This is actually a very nice bath with dual basins and modern taps. I agree that replacing the juvenile looking knobs would be a great, inexpensive upgrade. I like this bold striped shower curtain from West Elm.

Two of the same shower curtain hung side by side will give the room a very luxurious feel. Use the window to your advantage - remove the blinds and build a shallow shelving unit to hold rolled white bath towels, hand towels, pretty displays of bath soaps and accessories. [houzz=]