I’m not sure quite what this is trying to say. My laptop is already a personal cluster — it has 16 cores, lots of storage, a fast network, I run VMs on it. It’s been the case for a long time that you can run bursty jobs in the cloud if you need more power for a brief period than whatever is currently locally affordable. That’s kind of what the cloud is for, really. So what’s new?
It’s pretty fun to throw a thousand cores at a problem, but I guess it won’t be that long before you can get that in two-socket AMD workstation or whatever.