I have no idea how Itanium worked as far as security goes, but I do believe they want x86-64 dead.
In an ideal world, the goyim will own a Qualcomm or Apple ARM "dumb terminal" (see the MacBook Neo as a potential catalyst for this) that has very little local processing power and simply connects to a datacenter in Uttar Pradesh for the goyim to watch TikTok/YouTube on. Then they will make it a subscription service, and require a valid government ID for access (which California is already trying to push regardless of OS, but for now it's just a set number)
And for those who want to change the OS, it will be much like Android phones. Every phone has a unique bootloader, unique proprietary drivers, basically no standardization at all. ARM allows for this, and currently x86 & UEFI get in the way. Although secure boot is a thing, along with the ME/PSP. Bleh.