The article presents the current state-of-the-art of the European HPC ecosystem design and implementation. It covers the benefits for all ecosystem stakeholders: scientific end-users, operational staff, architecture vendors, owners of the computational facilities. The PRACE – Partnership for Advanced Computing In Europe initiative has started the preparation of the background towards the legal form of the related activities. It benefits in the creation of the PRACE non-profit association AISBL, registered in Brussels. During the implementation phase of PRACE, the scientific community has been given free and transparent access to the world-class supercomputing systems in Europe. Polish scientists and researchers may apply for the computational cycles.