Digital Twin is something that is mentioned more and more often. A simple example is Google Maps where you can navigate through your own street through technology. Its a virtual digital twin of our real environment.
While this is great, the digital twin in this example it is also very limited. You cannot use it to decorate the outside of your house or simulate what happens when there is an earthquake. But this can be added in other use cases.
The idea is great, a Digital Twin can be valuable as you can quickly get a view/idea without large investments in time and money. In the example of Google Maps, you dont need to travel onsite to take a peek.