Some internet/local network server on the network should provide software to do that. This software should be competed on separate from the network of thing dev

Some internet/local network server on the network should provide software to do that. This software should be competed on separate from the network of thing devices individually (and should probably have open source interfaces and implementations; an industry consortium like the Khronos group - OpenGL, OpenCL, Vulkan, etc. - would be perfect). You could buy a pre-built box for it, it might get folded into the future all-in-1 router/modem (website) or console/TV box, you can have your laptop or old desktop do it, etc. That way there is a single authoritative device to secure and control everything with, a single device to reset if it becomes compromised, etc. Updates can be in cryptographically signed bundles from their manufacturers. And any smart algorithms can be run through the server. Arbitrary code execution on devices would be strongly discouraged by industry practice.