Survival of the fitest

WARC reports on a research conducted by Forrester that was designed to understand what agencies we employ in the digital space.
Results of the research should not come as a surprise. This is my take out.

What it tells us is that we have come at a crucial phase in the evolution of species. The old, monolith species are being challenged by new, nimble and more specialised ones.
Advertisers like the old species because they know and understand brands and are a one stop shop. Yet, they also like the new one because they have the specialised skills and in depth understanding of digital that the old species do not have.
What species will survive?
Personally I don't think this is a case of either/or. In order to survive the monoliths will need to become a conglomerate of small and nimble. The challenge being, how to connect the dots so as to offer an integrated solution to customers. This will be an on going evolution: new media will continue to emerge and with them new service providers.
If the monoliths don't offer the services, customers will turn to the specialised shops.
The old species will have been warned: go to sleep and you'll never wake up again. You need to remain vigilant all the time, ready to adapt to the changing environment and the challenges of the new species.
I wonder what Darwin would have to say about this?