How does C# 5.0's async-await feature differ from the TPL?

Question

I don\'t see the different between C#\'s (and VB\'s) new async features, and .NET 4.0\'s Task Parallel Library. Take, for example, Eric Lippert\'s code from here:

Answer 1

The ability to turn the program flow of control into a state machine is what makes these new keywords intresting. Think of it as yielding control, rather than values.

Check out this Channel 9 video of Anders talking about the new feature.