Big data usually includes data sets with sizes beyond the ability of commonly used software tools to capture, curate, manage, and process data within a tolerable elapsed time
Business Intelligence uses descriptive statistics with data with high information density to measure things, detect trends
Big data uses inductive statistics from nonlinear system identification to infer laws from large sets of data to reveal relationships, dependencies and perform predictions of outcomes and behaviors.
The dream would become true with the big data analytics.