African Business - the next big thing?

I saw on CNN that the magazine "Africa Investor" is published in three languages: English, Portugese, and Chinese. So that tells you who invests in Africa.
The Chinese are supposedly expanding into Africa, since they see this as a fresh market, a good place to get raw materials, and also a place where labor is even cheaper than China.
What will that mean? Well, if they get committed enough, and there is unrest, the Chinese military will find a reason to step in - just like the russians and americans did during the cold war. Although in parts of Africa, somebody coming in to enforce order may actually be a good thing.
It will also mean investments in infrastructure - but only that geared towards exporting. And it will mean investments in farming, but only to export. The Africans may still starve, because starvation usually depends on the food delivery, not the production. And the Chinese, if they take over, will not be strangers to a bit of graft and creative reallocation of resources. They do it often enough in China, and even if the government does not like it, there is no reason to believe they will stop when they go abroad. On the contrary; if they can make business based on graft, they will. China does not have an ethics watchdog.
It will also mean that the Africans will have to learn work discipline - but they will do it in airconditioned factories. The worst Chinese workplaces are still small family firms, but those will not move to China. It is those with some capital who will move their businesses, making sneakers or other goods which require lots of manual labor.
Chinese workers do not have much choice, but if they have to choose between a factory where you get paid one dollar a day and get to sleep in a dorm, eat in the factory canteen, and make sneakers; or the same but you have to breathe poisonous fumes and handle acid vats all day, then I think I know what people chooses.
It will mean that people in Africa will have to start like the Chinese: I work like a dog now, but my children will have it good. And that is hard to see, in most African cultures.
So perhaps, in the long run, it will be true. But if I was a Chinese investor, I might prefer to put my money in Brazil.