General Mills will be making Cheerios GMO-free. This is one of the first big-time responses to consumer concern over genetically modified foods. If this is the beginning of a trend, the impact on seed-technology companies like Monsanto could be substantial. The removal of GMOs from Cheerios much and in terms of the big picture but Monsanto should be worried that this may be a watershed moment for frankenfood, which is now nearly ubiquitous in our food and in the environment.