VMware has recently released its new VM hypervisor product, VMware ESXi 5.0.
VMware is replacing its current ESX model with ESXi and the biggest change (between ESX and ESXi) is the architecture, as most of you VM gurus are well aware of, but for the people that don't know I will quickly explain.
For instructions about conducting an orchestrated virtual machine upgrade, see section in the v Sphere Upgrade Guide.
For complete documentation about Update Manager, see Installing and Administering VMware v Sphere Update Manager.
If you don't have a commercial VMware license, and instead are using a trial, free, or EVALExperience ESXi 6.0 or ESXi 6.0 Update 1/1a/1b, you won't be able to easily download the 6.0 Update 2 ISO directly. FYI, you are supposed to update your v Center Server Appliance (VCSA) before you update your ESXi hosts, for the reasons VMware explains here, and William Lam here.
When the reboot is complete, you'll see for yourself that you now have the latest ESXi, Build 3620759, as pictured above.
For my Super Server Workstation, I didn't have to worry about VIBs: the stock drivers built into 6.0 are all I need to succeed.
Even if I do need AHCI or NVMe VIBs in the future, I can just re-add such VIBs after similar future upgrades, or even inject them into a custom ISO.
This article assumes that you have read the documentation for the update you are applying.
For more information, see the VMware v Sphere 6.0 Release Notes and the v Sphere 6.0 Upgrade Guide. If there is a discrepancy between the guide and this article, assume that the guide is correct.