i hope you're right, but available evidence points the other way: * glaciers are melting at unprecedented rate, even glaciers previously thought safe like the ones in Antarctica * as a result, drinking water is running low in many densely-populated places; even groundwater is being exhausted * we're in the middle of a mass extinction * coral reefs are under threat, and higher ocean acidity may destroy the ability of new corals to form in the future

not sure about arable land and coastal cities underwater (certainly some will be), but even without those it's looking dire.