OLPC is working to design an unbreakable screen and thus may not have the XO-3 prototypes ready to show at CES in January. Marvell and its partners will likely have lots of tablets to show by then though. An unbreakable and sunlight readable Pixel Qi screen is an important feature of the XO-3 to make it a viable option for developing countries, as well as its abilities to be used for full productivity and for fast text input.
Source: pcworld.com