Imagine you live in a world that the concept of a screen no longer exists. You no longer need to have a fairly large gadget (like a TV) to view films or play games. Imagine when any wall can be a display and just about any device can produce a large screen for you on any wall you want. You no longer have to look at a tiny screen of a mobile phone and hope that you can actually read it. Your experience goes from ‘lean forward and squint’ to ‘sit back, watch and enjoy’, making your experience a lot richer and more rewarding.

You are walking around in the ruins trying to be careful not to create too much dust. After all, you don’t want to give your position away. The situation is critical. The enemy is coming towards you in droves and you need to get out of here to get yourself back to the base. You were part of an advance reconnaissance team on a top secret mission. The last thing you want is to let the enemy know you where here. It will lead to all sorts of political issues. You are wearing the latest gadget the military has acquired; the Invisible Cloak. It is almost a privilege to wear it. It effectively makes you transparent, much like the good old Predator movie. You can’t believe they actually made it. But here it is and you are wearing it. The module that comes with it is rather bulky, and makes you twice as large, but at least they won’t be able to see you …

Invisibility has been our dream for a long time and as demonstrated in many movies and work of fiction such as ‘The Invisible Man’ by H. G. Wells, it can be put to good use or it can be abused.

You are amazed by its sheer complexity. You can see machines of all types. This thing makes everything; digger robots for mining, transport robots, warehouse robots, energy capturing robots, assembly robots, designer robots, repair robots, meta-repair robots and everything in between. The end result of all this effort; more robots.

You don’t want to call this thing a factory although that is a close approximation. You like to think of the whole system as one big self-replicating machine. It is all self-contained and self-maintained by machines. We had never had it so good. Life is easy …

Self-replicating machines have long been a goal humans have longed for. Its advantages are clear. You setup the machine once and it doesn’t need human intervention. It can go on its own business and make the final product you are after while making all other products necessary to sustain itself, find energy and material and also grow its production capacity if required.

Self-replication can be considered in two separate scales; macro and nano. In macro scale, self-replicating machines are usually depicted as robots while nano-scale self-replicators are used to construct nano-machines used for a different set of applications. For example, macro scale self-replicators can be used to terraform a planet and make it habitable, while the nano-scale replicators can be used to hunt for cancer cells in a human body and attempt to kill them.

Finally, you swing around your axe, spin around yourself and bang. The monster is dead! Wooh! You are breathless. That required lots of complicated manoeuvres. You had to fight the monster five times before you could take it down. Your heart rate is up and you are panting. You need to rest a bit. This game is so cool. You drink some water. Right! You are ready for more. You resume your walk in the jungle. You hear some noises. Suddenly, you see two orcs approaching you from left. Ok, this time you need to kill them both at once…

Exergaming is a combination of exercising and gaming. The game creates an environment for you that is entertaining and motivates you do perform fitness-related exercises usually using dedicated hardware interfaces.

You are sitting in a football (soccer) stadium. There is a huge crowd. You know that apart from the 100,000 people in the stadium, there must be at least a couple of billion people watching the event. This is unprecedented and there has been a huge media interest for this. By now, everyone on the planet must know what is about to happen today. A lot of the details have been deliberately kept secret, so anticipations are high. It feels more like a product lunch of a super-cool gadget than a competition between several teams. But, oh galaxies, isn’t this exciting. The teams have been practicing for years, but everyone is drawn into anticipation to see what is about to happen. It is World Cup after all, and it is the first game between two very interesting teams. One is the champion from last World Cup and the other is, well, a team of robots! The referee blows his whistle and the captain of Team Invincible kicks the ball. Here we go … They are so agile. Wow, this is going to be a close one. Is it actually possible that they could win, in a fair game? That will be news indeed. First time in history! They look so lifelike and superior, you feel you don’t want to mess with them. It’s as if everyone wants both sides to win. Humans versus machines. At last, the dream is coming true. The football of the century; 11 humans versus 11 robots and one goal: to win the World Cup. Humans want it just as bad as the robots. It is 2050 …

Robotics is a technology that most people are familiar with as the idea of intelligent machines is quite old. Numerous works of fiction and movies on this subject show how interested we are in making and using robots for a variety of applications.