A security robot inspects a transformer substation in Hangzhou, East China's Zhejiang province, Aug 19, 2015. [Photo/IC]

Since the first robot Maria appeared in the movie Metropolis in 1927, more and more robots have been featured in various media performing different roles in daily life.

As robots get smarter, some people are concerned they will threaten humans, and finally replace humans on Earth. Driven by these concerns, lots of Hollywood filmmakers have made movies about the struggle between robots and humans.

However, we are at the dawn of the robot era - so are you ready to welcome them, or to take up arms?