Still, Dyson is a bit of a snake-oil salesman. He makes sleek, designer houseware and peddles it via the outlets frequented by those with disposable income whom are always looking out for sleek, designer houseware.
An impeller that leverages the venturi effect does not a visionary make. It just means the new, inefficiently-placed blades are going to be almost impossible to clean off once they become gunked up with allergens.
Dyson didn't pioneer vortex separation technology, either. That shit's been around for many decades, and is likely older than I am.