Adidas hosted a media day at its North American headquarters on Thursday to showcase products for the upcoming World Cup. The company is betting heavy on a global sales boost from the soccer tournament, which is one of the world's most-watched sporting events. On display Thursday: four new soccer cleats and several uniforms for national teams expected to compete for the World Cup. Adidas is the official athletic sponsor of the event and has designed the game ball since 1970 when it made the Telstar,…