Quite a lot of startups are hoping to hoist tourists to the stratosphere using pressurized capsules and big gas-filled balloons. CNBC spoke to 3 of them, France-based Zephalto, Florida-based Space Perspective and Arizona-based World View. The balloon trips would not take passengers all the best way into space but the businesses said passengers would find a way to experience the “overview effect,” a typical, highly emotional phenomenon felt by astronauts once they see the earth against the blackness of space.