That prediction is so wrong.
First off that has to be exaggerated.
Second off the qualifications for overweight and obese are flawed in themselves. As they only take into account age, height and weight. For example: my 46 year old father who runs at least 5 miles on most days and has clearly defined muscle tone, is considered overweight and close to obese. Want to know why? Its because he is below average height and has above average muscle mass.
Third off People can be fat if they want to its their choice (usually) if they want to live that way.