Interesting article. Reminds me of 'District 9'. Aliens looking for resources. Obviously, in a galaxy with thousands of life forms, there'd be no reason to venture out 50light years unless you have something to gain. Thus, either aliens are friendly, like the Vulcans, or are dangerous colonizers like humans.
When contact is made, it'll either be the first time ever in this galaxy that species from different worlds have contacted each other, or we'll be regarded by the aliens as just another in a long line of life forms. Obviously, for us it'll be something, but for them as exciting as watching grass grow.