The architecture of Google is utterly useless for many businesses cases.There are many use cases where it'd be perfectly appropriate.
it does not and can not provide accurate answers to queries.
In most cases, businesses don't really care about accurate answers to queries; they want quick, more-or-less correct answers. For example, suppose Amazon has a dashboard that shows their book sales on an hourly basis. Timeliness is more important than exactness here, and answers more precise than the pixel resolution of the graph on the big TV are wasted. A "big data" style query that is 99% correct and runs in 5 seconds is much more valuable here than the exact answer that returns in 2 hours.
For accounting types of reporting, slow, exact architectures are probably more appropriate. For realtime analytics, a best guess that comes back immediately may be the right thing.