The 25th year of IPDPS gives us the opportunity to look back and (to attempt) to assess what has gone wrong, what has gone well, and what came as a surprise, in the field of parallel and distributed processing. The panel members will give a few examples of striking events that took place in their area (covering Algorithms/ Applications/ Architectures/ Software). They will also give a short statement on how they would summarize the evolution of the field as a whole over the last 25 years. Panelists: William (Bill) Dally, Stanford & NVIDIA Jack Dongarra, University of Tennessee & Oak Ridge National Laboratory Satoshi Matsuoka, Tokyo Institute of Technology, Japan Rob Schreiber, HP Labs, Palo Alto Horst Simon, NERSC, Lawrence Berkeley National Laboratory Uzi Vishkin, University of Maryland