Here is the video where Microchip gave a sneak peek at the RISC-V Summit.
https://youtu.be/P5xGxedPMyMKey takeaways:
• 2x Performance per Watt vs PolarFire1 (which already claimed 2x Performance per Watt vs Kintex-7 and Cyclone V)
• 15x TOP/s vs PolarFire1
• 2x Fabric Performance vs PolarFire1
• Still SEU Immune but now supports partial reconfiguration
• New Design Suite (alternative to Libero SoC)
More details will be released at the Microchip Mi-V Summit in the Summer.