Designer wall decals were hot off the press from BLIK several years ago. A modern alternative to fresco paintings and wallpaper. Nowadays, you can get wall decals in all designs and sizes from IKEA, plethora of online merchants and push carts that churn out customized designs in a standard 100cm x 50cm sheet of vinyl sticker. Same stuff you use on your car or in shop windows. Only these are specifically for home use.
Picture of my bedroom wall before (above) and after (below). Now I am addicted and have to fill the other walls as well.