This doesn't require new technology. We know how to make electric cars, electric heat pumps, solar panels, nuclear reactors etc. This is all existing technology.
But take a look at oil prices right now. That's what happens if you start to reduce world demand for oil, and that's the real problem. All we need from governments is to put a sufficient tax on carbon that keeps carbon more expensive than alternatives even as the demand for oil and coal falls off a cliff.
Which doesn't even make oil dramatically more expensive -- it only keeps it at least as expensive as it was last year against declining demand, as economies of scale pick up for carbon alternatives and they become cheaper and thus more customers choose them.
A carbon tax doesn't destroy the economy, all it does is destroy the oil industry (faster).