That's what we noticed as well. Calorie counting is valuable on it's own, but we think that the biggest benefit of tracking what you eat is the awareness that it builds up. It really helps you figure out what the weak points of your diet are.
Having this integrated into google glass or spectacles would be great.
Putting it out there: I would pay a lot of money for a consumer tech wearable or even implant that would track calorie consumption in the background.