IIRC, they never changed the PiP, but it was based on the 2012-2015 Prius Liftback. They probably won't change much for 2018, but maybe 2019. The Prius sales have been pretty poor lately, so they might not change anything. They may be waiting for gas prices to rise. The gen 4 for 2017 got some significant changes to the standard features and option packages after just one year.