Imagine a world where the speed of wireless transmission reaches the point where sending a process to cloud, having a supercomputer perform the computation task, then sending it back is as fast as or faster than processing the task on your personal device. At that point, you wouldn't need CPUs on your phone, laptop, or AR goggles anymore; they would just be compact, foldable LED screens with a wireless transmitter and receiver.I'm not sure 6G is needed, but faster wireless internet, greater CPU processor and such are all necessary in making future industries more efficient.
Imagine getting access to the latest internet services and the metaverse for less than $50 and never needing to replace your hardware. So cheap that even those in extreme poverty can afford one. A true democratization of technology. That's just the tip of the iceberg of what wireless communications can realize in the next few decades.