## 8 Conclusions
Unlimited number of sensing nodes & 19; 24; 25; 26; 27; 32; 32; 32; 329; 331; 332; 333; 334; 343; 344; 345; 346; 347; 348; 349; 350; 351; 352; 353; 354; 355; 356; 357; 358; 359; 360; 361; 362; 363; 364; 365; 366; 366; 367; 368; 369; 370; 371; 372; 373; 374; 375; 376; 377; 378; 379; 380; 381; 382; 383; 384; 385; 386; 387; 388; 388; 389; 390; 391; 392; 393; 401; 402; 403; 404; 405; 406 sectors. The motivation behind the chosen approach was to go beyond conceptualization and identify where 6G and its enabling technologies can be of use across various societal domains. As highlighted in the use cases, the future wireless networks have several challenges to provide the different sectors with a reliable communication link. These challenges open the way for scholars to push the limitations of what is currently possible. In the following, we highlight the main open research questions, with respect to the key drivers of 6G, to incorporate the technology in each of the use cases. The first driver is the high fidelity holographic society, which refers to the applications that have simultaneous and interactive communication. The question that arises from the use case is as follows:  
* Assistive technologies for the visually impaired:
* Can 6G provide users with real-time video-streaming capabilities? If 6G is able to significantly reduce the end-to-end latency and improve the information freshness, then can we improve the usability of the assistive technologies with the connection to the cloud? The second driver is the massive number of connected devices, referred to as \"Connectivity for All Things\". Most of the presented use cases require a reliable connectivity, and the questions arisen are the following:  
* Human activity monitoring:
* To what extent could the concept of 6G sensing contribute to the state of the art of the in-home monitoring of activities? * Assistive technologies for the visually impaired:
* How can we provide ubiquitous coverage to rural areas using 6G, where visually-impaired users may be located? * Smart grid:
* Can 6G and its enabling technologies help increase the data resolution of energy monitoring to improve energy-conscious behaviour and make contributions towards the 2050 Net Zero carbon target? * Industry 4.0 :
* Can 6G communication overcome the challenge of integrating highly robust legacy automation equipment with Industry 4.0 enabling technologies? The last driver is time-sensitive applications. The open research question are as follows:  
* Human activity monitoring:
* Can 6G and its enabling technologies help facilitate the switching from hospital care to in-home care through the real-time monitoring of patients? * What is the best location to do the computationally complex calculations in future transport systems? In answering this question, it can help manufacturers to determine the best network topology and requirements. * Can 6G communication provide robust reliability and the required latency for the real-time control of industrial automation systems powered by machine-learning algorithms? The authors are convinced that the envisaged potential for 6G and its enabling technologies will have nothing but positive impacts on the presented use cases and the societal sectors that they represent, and will be key in addressing major worldwide issues, such as the ageing population and climate change. **Author Contributions:** Conceptualisation, B.B. and A.T.; IoT Use Cases B.B., A.T., R.S., A.S., S.A. and P.M.L. ; writing--original draft preparation, B.B., A.T., R.S., A.S. and S.A.; writing--review and editing, B.B., A.T. and I.J.W. ; supervision, S.K., Q.H.A. and M.A.I. All authors have read and agreed to the published version of the manuscript. This research received no external funding. **Data Availability Statement:** Data sharing is not applicable to this article. **Conflicts of Interest:** The authors declare no conflict of interest.