I have seen some bars adopt the real-time keg levels on their beer menu boards but now a brewer (albeit a large one that rhymes with Snarlsberg) is sending out their smart beer kegs. A tablet and (I assume an app) are all that is needed to monitor a keg. From when a beer is poured to when it is getting near empty and probably send the data to Facebook too.
These kegs will be in Europe to start and if they catch on might be used across the network. Maybe even by Lagunitas.