Shopping late on Friday night, the only light milk available was this organic brand. Now organic milk is the only organic product that's been shown to have health benefits. The animal husbandry advantages are big too.
But why "unhomogenised"? Is it just that the demographic that's keen on organic products is also phobic of big words they don't understand? You'll note that it doesn't specify "unpasteurised", because that's not allowed in Australia.
Homogenization, with regards to milk, is a very simple process that doesn't chemically change the milk. The milk is forced through very fine nozzles, which breaks up the fat globules into smaller globules. The effect is that, unlike milk straight from the cow, homogenized milk doesn't separate out into cream and less-fatty milk.