In ancient times heroes like Marco Polo and Christopher Columbus explored the unknown territories of the globe. Today world traveling has become a teenage tourist activity, but luckily there are always other spheres to be conquered. No, I don't mean space traveling that used to be so fashionable in the sixties. Forget about the Universe boys, here is the Metaverse! Some daring discoverers already made a Metaverse Roadmap (PDF) with all the stuff we should know about this culturally emerged nature.
"What happens when video games meet Web 2.0? When virtual worlds meet geospatial maps of the planet? When simulations get real and life and business go virtual? When you use a virtual Earth to navigate the physical Earth, and your avatar becomes your online agent? What happens is the metaverse."