Oh I am fully convinced there are a couple hidden wonders still to be discovered. If a 3 kilometers wide rose-shaped coral reefs, Tapanuli orangutans, and another moon of Jupiter can go undiscovered until modern times, then I'm sure there is some seemingly obvious discoveries like these rocks left as well. Besides, lots of people had seen those rocks before someone pointed out the obvious. So for all we know, the satellites might have already photographed the next big discovery, but we just haven't looked at it hard enough to realize its potential.