Well this is pretty cool tech. Basically some German scientists have developed a machine/software that can identify the sugar content of grapes using the various optical properties related to sugar levels, and then sort them correctly for wine production. This could be a great way for Australian wineries to increase productivity, whilst still maintaining quality - when it has been proven and ready for production.
"After the scan, the system's software takes over. Based on its analysis of the colors of individual items on the belt, it controls air jets that blow bad grapes and detritus off the belt and sorts the remaining berries into grades for production of various qualities of wine."
Read the full article Optical Technique Sorts Grapes for Wine Quality