Power BI Report Server is now part of Power BI Premium. Power BI Premium, with Power BI Report Server will get you covered with a complete solution. Power BI Premium provides dedicated capacity in the cloud and enhanced performance – without requiring per-user licenses for those consuming reports. And, it includes Power BI Report Server for on-premises reporting too.
Try this link to get started with Power BI Report Server (Download FREE trial). You just have to fill small form and that will kick the download. And good thing is – you can use any valid email address of yours for this download to work.
What Power BI Report Server comprises of: Power BI Report Server is an on-premises report server with a web portal in which you display and manage reports and KPIs, along with the tools to create Power BI reports, paginated reports, mobile reports, and KPIs.
See the comparison of Power BI Report Server with SQL Server Reporting Services (SSRS)
See the comparison of Power BI Report Server with Power BI Service (i.e. www.powerbi.com)
Don’t forget to see the licensing terms
Get yourself familiarized with features of Power BI Report Server
If you still want to get a complete glance of it then watch a video presentation from Microsoft Ignite session here.