Back on November 10, 2016, we wrote about the coming support for Power BI Desktop reports by SSRS. See Upload Power BI Desktop .pbix to SSRS 2016. We'll a few days ago, on May 3, 2017, the SSRS Team Blog posted an announcement that it was almost ready. Almost.
It's called Power BI Report Server, and as of May 8, 2017, it is still in the "...coming soon." status. The sort-of good news is that if you have an Enterprise Edition, per-core license, with Active Software Assurance (SA), it is included. Or if you have Power BI Premium licenses. For all the rest of us, we'll not so much. If you have looked over our earlier review, it seamlessly worked with SSRS's rebuild engine. So, we are hoping that this is still the case.
You can review the official Power BI Report Server introduction here: Introducing Power BI Report Server , along with the SSRS Team Blog here: Introducing Power BI Report Server for on-premises Power BI report publishing.