While I'm sure getting a terabit to the home would be wonderful, the real-world situation is most people are going to continue to have copper to the home for years/decades due to regulatory capture.
Is the Probabilistic Constellation Shaping concept also applicable to twisted pair/coax copper? Because being able to get some people decent DSL would be a major advance. My parents still can't get 1990's-vintage 200 kbs DSL because in 20 years, AT&T still hasn't run fiber *to their own fucking cabinets*, much less the home.
I know AT&T already has g.fast, but that's one of those things that's mostly only useful for short distances and "demonstrations", the actual real-world speed isn't much better than DSL after so many hundred feet, and it would have required the same AT&T who has refused to spend money on fiber to spend money to upgrade their existing cabinets.