Among the changes in historical events are changes in technological advancements. There are technologies available today, steadily developed over the past decades, that weren’t even in the works yet a year ago.
The murder on JFK is often discussed in relation to the mandala effect, not only because of 6 seats, or his wife’s actions, but also because it was filmed in color, while many people remember seeing it in black and white originally. It appears that color TV was invented perhaps two decades earlier, and with that, many other technological advances were sped up.
One example is 3D projection mapping, a technology that is widespread today and is used in research and entertainment alike. Another is the use of camera drones, which has just come into public awareness recently, but has suddenly also been used in the movie industry for decades.