I will believe it when I can pull out my visa card, go to some online stores (such as those that resell Supermicro, Tyan, MSI, Quanta, etc), buy a Power9 capable ATX motherboard from one of the top-ten taiwanese motherboard manufacturers for $350, put a $300 CPU in it, $300 to $400 of RAM and build a 1U server with it. Until that happens it will not get into the hands of enough developers/sysadmin/devops/engineers to matter.