Jeff Kelly wrote an interesting piece on the opportunities and challenges of Industrial Internet last September in Wikibon. Link to the article is here:

http://wikibon.org/wiki/v/The_Industrial_Internet_and_Big_Data_Analytics%3A_Opportunities_and_Challenges

In his list of challenges, I would add the risk of mixing correlation with causation. This is possible with any size of data, but the bigger the data, the bigger the risk. Big data can yield almost any kinds of correlations. Understanding which ones have actual causal relationships makes all the difference  for businesses.