Making nuclear fusion viable — practically!

The nuclear fusion startup Helion, which announced that it has raised $500 million, says it has developed new technologies that may make nuclear fusion viable — practically, economically and environmentally. It is too early to tell if its claims will pan out, but there have been so many breakthroughs lately that they cannot be dismissed.
The possibility of carbon-free energy generation raises a seldom discussed question: Just how much would it change the world if cheap and clean energy sources were truly abundant?
Keep in mind that one source of cheap, clean power will lead to others. Maybe nuclear fusion cannot be used to fly a jet plane, but perhaps it could be used to produce relatively clean hydrogen fuel, which could then be deployed in ways fusion could not. A chain reaction would occur, eventually bringing cheap, clean energy across the economy. How about a supersonic or perhaps suborbital flight from Washington to Tokyo? A trip to Antarctica would no longer seem so daunting. Many remote places would be transformed, one hopes for the better.
One second-order effect is that countries with good infrastructure planning would reap a significant relative gain. The fast train from Paris to Nice would become faster yet, but would trains on the Acela corridor?
Next in line: Desalinating water would become cheap and easy, enabling the transformation and terraforming of many landscapes. Nevada would boom, though a vigorous environmental debate might ensue: Just how many deserts should we keep around? Over time, Mali would become much greener.
How about heating and cooling? It might be possible to manipulate temperatures outdoors, so Denmark in January no longer be so unbearable. It wouldn’t be too hard to melt snow or generate a cooling breeze.
Wages would also rise significantly. Not only would more goods and services be available, but the demand for labour would also skyrocket. If flying to Tokyo is easier, demand for pilots will be higher. Eventually, more flying would be automated. Robots would become far more plentiful, which would set off yet more second- and third-order effects.
Cheap energy would also make supercomputing more available, crypto more convenient, and nanotechnology more likely.

—Bloomberg