Incredible Tech Found in Sci-Fi Films

As you know, an important part of my opening is the inclusion of a tech device. This implant on the character develops the plot of the film as the character learns from each memory, triggered from the implant, that he is the last man alive, and the reasons as to why he was the only one to survive.

So, I did some research on unique tech gadgets seen in films to learn how they are implemented in the film. I already know the purpose of the implant, but I do need to find a way for the character to discover it accidentally, and I thought by looking up examples, I could come up with something.
Here's a list of the coolest gadgets I found:

Neuralyzer 

Men in Black (1997)

These neuralyzers were given to the alien assassins if they ever say something they aren't supposed to. The purpose of this pen-looking device is to wipe the memories of whoever the device is pointed to. Then once the memory is cleared, a new memory can be given and everything is back to normal. The first time a character pulls out the device, it is introduced to the audience by the man explaining what it can do to a group of people.

Lightsabers 

Star Wars Franchise

The lightsaber is first introduced in the Star Wars Episode IV: A New Hope (1977). This weapon is used by both the by opposing teams, but gained much popularity throughout time. Although it is just a simple weapon that comes in different colors, it became a staple to the Star Wars Franchise. Now whenever someone sees a lightsaber, their mind immediately goes to Star Wars because there is a connection between the two.

The Iron Man Suit + Jarvis

This suit is a weapon on it's own, but having the AI system built within it just improves it abilities. Tony Stark designed both the suit and the system to help him combat his enemies, and instantly this suit was the most significant part of the films. With time, the design of the suit changed, but gradually it gained more features that made it cooler. Jarvis, the artificial intelligence program plays a huge role in the films as well because it becomes a character on its own. Jarvis is a system Tony Stark can talk to while in the suit which allows the audience to see and know more.

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Overall, each of these gadgets serve a purpose for the film they're in which can be to develop the character, like the Iron Man suit, or to serve as a representation for the film like the lightsabers. Then there are simple small tech gadgets that are featured in sci-fi films that play an important role, like the neutralizer which helps the agents keep their identities protected. No matter the purpose, each device works to develop the storyline of each film.