The fact that they're a strong economy with a strong military and have a government wary of imperialism bodes well, as long as the can keep the number of revolutions and civil conflicts low. Stability is the key.
The continent of Africa remains the last frontier in outsourcing manufacturing, but right now it's not competitive: transport costs are high, there are issues with utilities, capricious governments, and no established concentration of expertise. The Chinese involvement is working hard on improving these for other reasons, but ironically it may enable Ethiopia to begin to take on roles that China has now in the global supply chain. It may also be deliberate: during a gold rush, most money was made by those who enabled the prospectors, not the prospectors themselves.