You can get RISC-V based single board computers today. I think the meaningful question is when we'll see RISC-V CPUs that are performance competitive with x86

You can get RISC-V based single board computers today. I think the meaningful question is when we'll see RISC-V CPUs that are performance competitive with x86 or ARM CPUs. In that case, probably not in the near future, at least not for several years at least. x86 and Arm CPUs have decades of optimization behind them. That's the CPU designs themselves, and also compilers, etc. RISC-V has a lot of catching up to do, and Arm and x86 aren't static targets. That isn't to say that RISC-V won't catch up. There's real momentum behind RISC-V. Also, the development of software built using machine learning introduces wildcards and the possibility of disruption. So in the medium to long term (end of the decade, maybe?) we might see interesting cell phones or laptops that are useful for more than Hacker News tinkerers. I'm looking forward to them.