A future unlikely to be that bad if the lessons from the geological past are any indication.
Well over a billion people in East Asia and Pacifica live at or near sea level. They also rely on the seas to provide ca. 60% of their dietary protein. All these changing oceanic conditions are also impacting well water in coastal areas, and will certainly impact fishing and other activities for obtaining food. How do you see these people adapting to the changes?
Some countries are looking at massive desalinization plants, and others RO farms for reverse osmosis of brackish, or even contaminated fresh water, which of course is becoming more polluted in many parts of the world. Some people in India have to spend hours a day just to get water to survive. Potable water as you likely know is becoming critical in a number of areas. Do you suppose the world governments are up to this Adapt requirement?
It certainly is a requirement if so many people wish to survive. Sadly, it seems the vast majority will have problems adapting. Besides dealing with the people's needs, governments will also have to deal with rebuilding port infrastructures, etc.. There must many trillion$ worth of industrial sites alone that will need to be moved, or abandoned to the seas. How will they deal with relocating all these people (likely more by the time the need arrives), and the cost of all that rebuilding, knowing you may need to do it all again in another 30 years or so? On the bright side, it does provide for a lot of job opportunities.
Still, on the whole, it all looks like the Mother of Logistical Nightmares.