In this paper, we attempt to paint a broad picture of
communication needs and technologies in the timeframe of 6G. The future of connectivity
is in the creation of digital twin worlds that are a true representation of the physical and
biological worlds at every spatial and time instant, unifying our experience across these
physical, biological and digital worlds. New themes are likely to emerge that will shape 6G
system requirements and technologies, such as: (i) new man–machine interfaces created
by a collection of multiple local devices acting in unison; (ii) ubiquitous universal computing
distributed among multiple local devices and the cloud; (iii) multi-sensory data fusion to
create multi-verse maps and new mixed-reality experiences; and (iv) precision sensing
and actuation to control the physical world.