Continent of Africa will be one of economic power houses of the world, as things are beginning to change naturally, as it evidence around us and in what you pointed out.
In Nigeria where I'm from for example Governors like Fashola (Lagos state) , Rochas(Imo state) Akpabio( Akwa ibom state) are serious and visionary leaders, they way they are transforming the states which other governors must be trying to emulate is a plus. Because when we talk of Africa we have to mention cells or components which make up the continent. When Ghana president died, it didn't take Ghana up to 72 hours to swear in Vice president as President. This is maturity.

Hochberg, in South African as part of a business delegation alongside US Secretary of State Hillary Clinton, said more US companies must invest in the "rich and deep market" in Africa.

Far greater than where it is today like never before in the  African continent, God almighty  which started it in Africa will finish it.
God bless Africa my continent, land of hope.

I can see a lot of potentials here, I belief government in all level must be doing something to seize all the opportunities presented by these natural resources.

With some facts you listed: "stopping of wars, new country creation: Southern Sudan; revolution that end eras of certain government  in Tunisia, Egypt and Libya, Playing of World cup in Africa, more discovering of oils in Nigeria"
Africa as continent is set in motion for great things ahead. Things you listed are to serve as reality not totality of various development and improvement gong on in the continent of Africa.