Samsung announced that it will be showing flexible and transparent OLED displays during CES, but it seems that those displays aren't new. The first display is a 4.5" WVGA flexible AMOLED. This seems to be the same display shown at the FPD 2010 exhibition (November 2010):
The second display is a 19" qFHD transparent (up to 30%) AMOLED for TVs and monitors, and also a 14" qFHD transparent AMOLED for notebooks. This also seems to be the same displays shown at the FPD exhibition.