I still think it's static electricity.Peeps already working on it. Google Dark Energy Survey. There are several competing theories for what is causing the effects attributed to 'dark energy' and variabilities found and carefully characterized will help determine which direction will be most promising for further research.
Don't forget that if dark energy truly is a force in opposition to gravity, and it can be generated and controlled as a localized anti-gravity, that's your flying car right there. No need to generate lift, just propulsion