There is a place for both lateral and vertical thinkers, but too many of either can be a disaster in a business climate. For example, too many lateral thinkers can monopolize a planning session with their creative ideas, but very little winds up getting done when it comes to problem solving -- you've got the problem laid out, but the path between "here" and "there" diverts too much with lateral thinkers tossing out various, distracting ideas.
On the other hand, too many vertical thinkers leads to limited originality when it comes to facing new challenges. That is because the steps necessary to solve the problem at hand may be couched in experience and history, but that is of limited use when dealing with something new. Some creative solutions, in that context, are necessary but the vertical thinkers can be useful in keeping the lateral ones on the linear path to reaching a solution.