Please Help for an exhibit!!!?

Question

I have to make an exhibit on any useful futuristic idea. I'm sure there must be lots which you know. Please help me as fast as possible.

Answer 1

Brain implants so that you can learn without any effort, like on The Matrix.

Or Yahoo! Answers.

Answer 2

Think of something you would like to have that doesn't exist yet, and make that your exhibit.
What would the world be like if we had that whatever-it-is, and how would people do things differently?

Like Star Trek transporter technology - why would you want it, how would that change the world (would cars go away? planes? would we need airports? buses?), what else would change?
Or replication technology - what would be down side, how would it change grocery stores, shopping malls, and food courts?

Gotta think outside the box. Watch some futuristic sci-fi shows (or better yet, read a sci-fi novel) for some other ideas.