The question is, what is that magical tipping point price? Unlike your solar vs grid example, isn't the alternative to capturing just doing nothing, which has essentially zero cost in our current economy?
This is the crux of the problem. There are no economic incentives for this, even if it became very cheap. We would simply have to agree, as a global society, to invest in carbon capture because it's the right thing to do.
Given our track record with this kind of thing, this does not look very likely. It's the tragedy of the commons writ large and I don't think anyone has a sane answer to it, or we would have done it already.
Even in the US there is consensus for doing something. Thankfully by the time that something happens it will be too late thanks to lobbying by people history will not look kindly upon.
Ignoring the scientific fraud behind the alternative answers, only 14% percent of "Conservative" republicans believe in man-made climate change - conserving what then?
I think extreme capitalism has driven greed to a point where people no-longer consider the ethical or social issues as they do not contribute to the bottom line.
However i do have faith that more emphasis is being put on the climate and people are gradually changing behaviour to prioritise industries helping transition to a net-zero society.
Given our track record with this kind of thing, this does not look very likely. It's the tragedy of the commons writ large and I don't think anyone has a sane answer to it, or we would have done it already.