Just because current detection schemes are outdated, and the monopolies are perhaps resting on their laurels, it does not mean the anti-virus age is over. I think it's a technological battle which will always be fought. There will always be attackers and defenders. There are already people experimenting with detection through artificial intelligence and the like. Imagine if that technology finally makes it (at this rate it is guaranteed), what would the next step? Wouldn't it be "nearly impossible" for attackers then? Yet nobody will write that the age of the Virus is over.