So, no details, "maybe 2022", and they're planning to make this on a process that Intel don't currently have working. If and when Intel do get a 7nm process working, Horse Creek will have to compete with Intel's bread and butter processors for access to it. Sure, where do I sign up?!
Horse Creek isn't being built to evaluate interest in RISC-V; they're doing that by making this announcement of total vapour. Only if there's a lot of interest will they later come up with a real plan to develop and manufacture it. Nothing to see here.