As people are rapidly changing their cell phones for latest models, our life is becoming more and more "mobile" - the mobile internet and apps replace the good old computer with software. We are so attached to our cell phones, that we no longer imagine our lives without them. Let us imagine how mobile phones would change people's lives if they were invented and used since centuries ago.
Photoshop cell phones used (any way you wish) in the famous works of art (paintings, statues, or frescos). The themepost provides a good example (many thanks to jeremix).