Maintaining competitive advantage is important part of purpose of company. Global view for transnational company fits well with company who considers themselves price leader. That move around globe for lower and lower costs can surely aid a company. On the other hand I think company with first mover strategy that is generally accomplished through technology advantage will not essentially find global focus will aid them maintain their competitive edge.
If the competitive advantage is quality and responsiveness of service organization how can global strategy aid you sustain your competitive advantage?