I mean, it's pretty realistic at incinerator plants, the concentrations and temperatures are such that you use up some reasonably small percentage of the total plant effect on capture and you can capture 90 % of the generated CO2.

The trick will be to make sure economic incentives don't lead to people simply building so many incinerators that you end up emitting more than before anyway...

Hard to say, its a big mega project, but then so is what we do today to keep getting more oil and gas. Same story goes for energy storage to make solar/wind workable at large scales. Very hard problem! So is sucking the last dregs of oil out of the ocean, or creating earthquakes to suck it out of the ground.

I reccomend Vaclav Smil's interviews on this subject. The short answer is no.