This is all about RISC-V servers for now. Those are arriving soon (later this year). Both Vector extensions and virtualization are essential features. This is where Ubuntu is planting their flag.
RVA23 will be a great foundation for the desktop too but that is not going to happen until the end of 2026 or even 2027. Any then though, RISC-V boards may actually be powerful enough to compete. At that point, Ubuntu will be ready with a mature ecosystem.
It all makes sense but I feel it purposely leaves us desktop or SoC users behind.