Cameras have been around since the 19th century. Furthermore, video cameras have been used by people around the world since the twentieth century. Even more, these marvelous devices are used for countless different aspects of our lives from taking footage and still pictures at a huge birthday bash to photographing supermodels to embellishing events such as galas, graduations, and important ceremonies.
Now, after that brief introduction, let's look at this technology from a different perspective. In other words, what if cameras and video cameras were developed at a much earlier time in human history? For instance, instead of the 1850s, cameras and even video cameras were invented by some genius in Papua New Guinea in 2 B.C. This would dramatically change the future horizon of every subsequent event for the next 2,015 years!
One way this would change things is that many of the great masterpieces such as paintings and sculptures seen in museums worldwide would not even exist. Furthermore, these artists who made these masterpieces would not even be known to the modern day world.
Another way this paradigm shift of technology would effect the world is that many thousands of years of human history would have been recorded for our very eyes to see! This would be neat; especially for history classes. Imagine seeing authentic footage of the life of many famous figures over the last 2,015 years such as Jesus Christ, King Henry VIII, many of the Roman emperors, all the royalty of England; and so on so forth? People wouldn't be able to doubt their existence or the amazing acts they've accomplished during their lifetime.
Finally, a third way that would occur from this earlier arrival of cameras and video cameras is the fact that these technologies would be way more advanced than they currently are in the year 2013. For example, we would probably be using a video camera that is completely a holographic image and uses holographic film to record images of the physical world. Furthermore, the pixel range would most likely be in the tera-to-peta-range; maybe even in the exa-range! With technologies like that, we would capture the world in ways unheard of at this moment in time!