Well, they certainly have gotten bigger. A standard turbine now stands about 70 to 80 metres tall. Each of its blades is around 40 to 50 metres long. It's expected that there's going to be an evolution in turbine technology, but not a revolution. Turbines 20 years from now are likely going to look similar to the ones you see now. They will use lighter materials, and there are likely going to be more of them offshore. Certainly the trend in Europe is towards moving them offshore. They don't have to be quite as high—there are better winds.
On October 5th, 2010. See this statement in context.