Market research is all about predicting the future... or attempting to at least. But, as human habits and patterns become more irrational, as some suggest, predicting the future based on the past is becoming increasingly difficult, yet ever-more important.
It's simply no longer logical to take the historical data found in market research and assume that it will predict the future. Yet, many businesses use it as such, and, maybe in the past, that was okay. Now, human behavior must be considered right alongside market research in an entirely new way.