It's not faster than running on an x86 CPU, but it's faster than an unaccelerated RISC-V CPU.

The entire platform is more for development of RISC-V software, especially at the operating system level, than it is an end-user product. There's still a lot of development needed to get RISC-V perf/watt, even with acceleration, to match ARM and x86 systems. I would expect at least a couple of years until then. RISC-V microcontrollers are already getting there, competing well with M0, but that's an entirely different market.