As the data-base for the Big Data Investment Map 2014 also includes the dates for most of the funding rounds, it’s not hard to create a time-series plot from this data. This should answer the question whether Big Data is already over the peak (cf. Gartner seeing Big Data reaching the “trough of disillusionment”) or if we still are to experience unseen heights? The answer should be quite clear:
The growth does look quite exponential to me. BTW: The early spike in 2007 has been the huge investment in VMWare by Intel and Cisco. Currently, I have not included IPOs and acquisitions in my calculations.