I saw an interview with a German virologist. Her estimate was to have fatality rate of around 2%. Also stated the issues of calculating these number during the outbreak as not all cases are known, not everyone is either cured or dead. She also hinted at a bias towards the severe cases as most minor ones, symptoms like a cold, aren't reported yet and most likely not admitted to a hospital.

As she said, we will only know once the thing is over.