Google on the importance of motion design

Design is continually evolving. Users are getting more sophisticated. The design landscape is more sophisticated. In particular, motion has become incredibly important over the last few years.

We [at Google] wanted something that was taking the very best of graphic design clarity and the innovations in motion graphics and motion communication but that still tapped into those elements of tangibility, of physicality that industrial designers themselves use.

— Matias Duarte, VP of Design at Google, Google I/O 2014 - Material design principles