A Roomba does not eat "pure electricity." It uses a current flow to cause chemical reactions within its lithium-ion battery; these reactions store current flow as potential energy. Again, very much like photosynthesis. This is nothing new. Not at all. They are reporting that bacteria have found a way to use current flow to synthesize carbohydrates - just as many other organisms use photons to generate current flow to synthesize carbohydrates, and just as many other chemical processes use electricity to create new compounds. This is well understood. Scientists understand it. Chemists understand it. Biologists understand it. The only person who doesn't understand it, and seems to think it is some sort of never before seen miracle, is you. Right! And when the Flash gets hit with the Speed Force he goes faster! Are you going to base your next "scientific claim" on that?