It’s a new design, kind of like an upright squirrel cage. There was a post on this Friday with images. They are going to use a maglev system for the bearings, almost frictionless. I think it’s a wonderful concept.
Well regardless of what kind of wind turbine it is I can not envision a system that would be efficient at both task.
A wind turbine must be able to capture the energy from a large area and a compressed air turbine is capturing the energy from a small area. You can not build a system that will do both well.
You could easily build a system that would have both turbines on the same shaft that could turn the same generator. This would save the expense of purchasing two generators. But you would lose some efficiency do to the increased inertia and turning resistance when one turbine is turning faster than the other.