James Dyson is 79 and still finding ways to apply hardcore engineering to random consumer products. He was in fine form pitching Dyson’s new $499 CameraJet toothbrush: “The first toothbrush with a camera. The first toothbrush with a jet. The first toothbrush to find the space between the teeth and floss while you brush.” Dyson says it created an ML algorithm trained on 470,000 mouth images to recognize the gaps to clean with water flossing.