[smarx007]

Plese stop talking about adding semantic annotations to every webpage as "semantic web". Semantic Web was originally to intended to make machine-to-machine communication a first class citizen on the web, to complement a human-friendly web. See https://videos.cern.ch/record/2671957 if you are interested in a bit of history (this video precedes cloud by ca. 12 years, IoT by 14 years, and digital twins by 18-19 years).

SOME people assumed this would require annotating human-targeted pages (artificial general intelligence and commonsense reasoning academics). This turned out to be wrong, by the way. IoT enabled machine-to-machine communication all right without annotations, not to mention that your IoT device is not really interested in those semantically annotated fake news posts and cat GIFs anyway. In fact, Wikipedia pages pull in some data from Wikidata, not the other way around (sorry DBpedia).

Now, the problem is that most IoT devices from different vendors can't talk to each other unless vendors team up explicitly. That's where semantics (on the API endpoints, for example) could help.