All speculation about what 6G might bring is just that: speculation. Historically, each digital generation has brought lower latency and higher bandwidth. Of those two trends, the latency performance is reaching limits: once the access network gets close to zero, additional improvement is not possible.
Bandwidth is virtually certain to keep climbing, however.
Beyond that, suggested lead applications always emerge, even if fulfillment often lags a generation or two. And there almost always are new techniques for processing signals. Better modulation techniques are available.
Signal processing gets more elaborate. 5G is the first mobile platform to be built on a virtualized core. 6G might be the first to incorporate artificial intelligence at a deep and wide level. But many applications said to be possible on 5G networks likely will not flourish until the 6G era. A tendency for suggested lead apps to arrive a decade later than expected has tended to be the case since 3G.
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