What would actually be useful is something that does the same for food, although I have no idea how that'd work (perhaps a probe of some kind). It's trivial to calculate nutritional information for beverages as a human, but for those of us who track such things, I have yet to see a really good system for solid foods that doesn't rely on human guessing about portion sizes and matching to existing known entities from a database of foods.
Related information: http://www.psfk.com/2014/04/siri-creator-builds-platform-tha...
http://gigaom.com/2014/04/03/dont-eat-that-sri-built-a-calor...
[1] http://www.cpc.unc.edu/projects/nutrans/policy/beverage/us-b...
This would definitely serve the huge market of folks who track their daily intake:
- People who (have to) do it for medical reasons
- People that want to loose weight and need to get a better understanding of what exactly they are eating every day (often times it is not enough or the ratio of macronutrients is out of place)
- Nearly every bodybuilder and fitness-addict