Eric Sloof(1, 2, 3) already explored the new “alarms and actions” capabilities. There’s one that really stands out in my opinion in the next release of ESX/vCenter(vSphere):

Indeed, “Enter maintenance mode“. Now you might wonder when you would want to use this. Wouldn’t it be nice that when your hardware is degraded, for instance memory status changed or hardware power changed, the host enters maintenance mode. I wouldn’t want to run virtual machines on a host that has a memory error or runs on only one power supply. Of course this action only applies to the “host” objects: