Hopefully but sadly that will most likely happen in the near by future. It might happen but if we introduce physical sport at younger ages we could prevent the people in Australia and in other countries to avoid this.
In Australia 63% of people are overweight to what Australia classes as overweight that is. 67% of the same amount of people surveyed from the 'abc' connect work's survey do little to none exercise or sport. (Tested on adults 18+)
This might be related to social media and new games such as flappy bird, etc. They get obsessed with trying to beat their old high score or beating their friend they just can't put their device down.
Technology may not be such a good thing because in this digital age many humans have shinny object syndrome and get distracted easily from exercise or what is important at the time.