Cisco bought Flip for $590 million in 2009. By 2011 it was toast. While visionary for a moment, it wasn't perceptive enough to the impact of the smartphone.

There is a case to be made that Oculus needs large amounts of capital to procure the manufacture of a huge volumes of headsets. Unless explicit guarantees were part of the sale, Facebook could allocate the capital to something else. They are a public company and the bottom line is their companies performance, not the success or failure of Oculus.