I'd play to my strengths if I were you. What are they?
If you're good at writing the sort of over-analysing you normally see when you're studying literature, I'd do something on, perhaps, the ethics of computer implants, or perhaps something on what role the Internet plays in human interaction and whether it's gotten richer or poorer as a result. You can pad ferociously while still sounding good.
If not, stick more to the facts. Start with a bullet point list, preferably something where there's some pros and cons, and expand them out into a paragraph where you explain what they are and why they're on the list. The possibilities for robotics, maybe - it's much more difficult than we thought to make a human-like robot, but in return we can make robots that do things not possible for human-like robots. Perhaps something on open-source development, and how it's commoditising the software market for good or bad.
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What do you call an elephant at the North Pole?
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