  The future of wireless network generations is revolving toward unlocking the
opportunities offered by virtualization and digitization services, with the aim
to realize improved quality-of-experience (QoE) and bring several advantages to
network users. According to the rapid development in the field of network
virtualization, we envision that future wireless networks will run over
ubiquitous deployment of virtualized components that are controlled by
artificial intelligence (AI), i.e., the conceptualization of the Digital Twin
(DT) paradigm. The key principle of the DT relies on creating a holistic
representation of wireless network elements, in addition to decoupling the
information pertaining to physical objects and dynamics, into a cyber twin. The
cyber twin will then leverage this information for AI models training, and then
reasoning and decision-making operations, which will be then reflected to the
physical environment, for improved sustainability. Motivated by this, in this
article, we dig deep into the intertwined role of wireless technologies as
being enablers and enabled by the DT. Furthermore, we put a forward-looking
vision of the integral role that future 6G networks are anticipated to play in
order to realize an efficient DT. Finally, we sketch the roadmap toward
identifying the limitations of the DT in 6G-enabled wireless networks, and open
new horizons for further developments in different design aspects.
