Nuclear plants take at least 10 years to be build. During that time millions of cars, stoves and boilers can be replaced. Look at Europe, their natural gas usage peaked in 2010.
> "I highly doubt any new reactor (that's not already in the planning phase) will come online in the US within the next 10 years."
That's a reasonable prediction. The US has essentially regulated new nuclear power plants out of existence over the past generation. That doesn't mean that there's anything about the technology that means it takes a decade to build, though. It's just a policy failure.