  Industry 4.0 is becoming more and more important for manufacturers as the
developments in the area of Internet of Things advance. Another technology
gaining more attention is data stream processing systems. Although such
streaming frameworks seem to be a natural fit for Industry 4.0 scenarios, their
application in this context is still low. The contributions in this paper are
threefold. Firstly, we present industry findings that we derived from site
inspections with a focus on Industry 4.0. Moreover, our view on Industry 4.0
and important related aspects is elaborated. As a third contribution, we
illustrate our opinion on why data stream processing technologies could act as
an enabler for Industry 4.0 and point out possible obstacles on this way.
