In 1848 people were just tired and full of anger for the "world" they were living in.

In 2011 people are not just tired and full of anger for the countries they're living in, but they also have communication they never had before, which means they can work with each other, and organize efficiently as they never could in past (anyone watched 300 movie how small but coordinated army defeated big one?).

I wouldn't dare to predict what will happened in those countries after revolutions, but I dare to predict many more countries where people are tired of same bullshit years over years will take same path.