This is really great!
Just checked and on my AMD Ryzen 5 the GIMP lava render took 5 seconds (compiled Appimage version) or 10 seconds (every damn other version, no idea why).
So the liechi Pi is a third of that speed, which is pretty damn impressive!
Indeed. If you did performance per watt, it would show even better.
The critical thing I saw here is that a RISC-V board is now outperforming a Pi 4. The price / performance just has to improve a bit more and RISC-V will be a viable alternative in the SBC market. I see it moving to laptops and tablets pretty quickly after that.
Totally independently, there are people trying to make RISC-V work for servers. As ARM has not really succeeded there, RISC-V may even beat them to it.
The place that I expect ARM to continue to dominate for quite some time is Phones. And x64 is not going anywhere for desktop and probably gaming for quite some time.
Performance / watt matters though and, as RISC-V improves, the long term picture for ARM especially gets pretty cloudy.