It is a little an illustration of using an aerostat or a kite as a lifter of a regular wind turbine, by juxtaposing proven technologies.
I see a problem: the aerostat generates a wind shadow on the front turbine and even more on the rear turbine, limiting their real respective swept areas.
Using the aerostat as a hub as illustrated might be a possibility, in spite of the difficulty to make a very large and thin annular generator.