Technologies that have not been invented (yet)

 Phones with Holographic screen and projector.

Bored of watching that video on your phone's small screen? Hey presto, the video projects on a wall. Want to project your PowerPoint presentation on a wall, but feel lazy to connect the projector to your computer? This phone is the solution. Your friends are crowding around you to see those photos you took on the beach during last summer? Tell them to have a seat and then project the photos on a wall.



Hoverboards
Its Not the usual ones that we see today but hoverboards that can actually lift us off the ground. They might even give us the sence of flying and when/if it is invented, it should get a lot of buyers regardless of how much dangerous it might be.

Flying car.
It would be the next private jet, just more expensive, it is more of a possibility than most other inventions that seem to be coming only hundreds of years from now because we already have flying machines in the air so why not make a smaller one and try?

Advantages and disadvantages of being left-handed.

Advantages
•You have an automatic cover sheet with your arm when taking a test since you are covering your answers as you move across.  
•In sports, people aren't expecting a lefty. 
•No one says, " I am really glad to be right handed." I hear people say they want to be lefties all the time. ( in volleyball)

• You can tell other people you're special and smart.  Of the last five presidents, four have been left handed.  Obama, Clinton, HW Bush, and Reagan.

• There are only 10% of you

• Easily winning an arm wrestling game with your left hand.



Disadvantages 

• Whenever you write in a spiral, your arm is crossing over the metal spiral, causing discomfort. 
• Having to deal with "Are you left-handed?" any time you use a pen with your left hand.
• If you are in sports, the coach just says, " Do the opposite." That may sound okay! But it is a lot easier to say than do literally the opposite of everyone else. 
•You can't make rightie jokes since 89% of the world is right-handed.
• Your hand smears over your work when you write, and you can't see what you have already written until you are done writing.
• Almost everything is built right-handed. 
• When you learn to hold your pencil, the teacher doesn't know how to translate it right for you, so you end up holding the pencil wrong for the rest of your life.