MSI Wind Top AE2220 was called all-in-one touchscreen PC. The starting price is 749$. Paying that, you will get a 21.5″ screen with a 1920 x 1080 resolution and an integrated Nvidia GeForce 9300 GPU.
Basically this gadget is as efficient as an normal PC but lot smaller. Also the developers say that will save about 35% of the energy consumed by a normal PC. On this touchscreen PC you are able to watch movies, photos, listen to music or play 3D games.