Technically Streamline Moderne only refers to a period style of, primarily American,
Architecture, not streamline design in general. The application of the term to anything
Streamline is of very recent origin and an artifact of the internet rather than scholarship
and design histories.
Wikipedia is one of the worst purveyors of mixed up crap and flat-out incorrect statements
when it comes to discussion of art and design of the period.
The Modern Era and/or The Machine Age are both better descriptors for the period.