Nah. It's really as simple as this: Southern climates are moving north. (In the northern hemisphere.) If you want a vision of the future, consider a New England that looks more like the Southeast.

There will be winners and losers. As climate zones move toward the poles, weather patterns and agricultural viability will shift with them. This will eventually turn current breadbaskets into deserts while warming up northern/southern regions for longer growing seasons.

Various regions will cross ecological thresholds, causing sudden, dramatic shifts in local climates. For example, a warmer Earth could bring monsoon rains back to the Sahara and Arabian deserts, turning them green once again. In general, a warmer world is a wetter world due to increased oceanic evaporation.

Sea levels will gradually begin rising, but perhaps at a rate of 1-2" per year. It takes a lot of heat to melt glaciers.

Human existence is not in doubt on account of the climate alone -- our prehistoric forebears had a lot worse to deal with -- but there could be mass population movements and alterations in how agriculture is handled globally. Current political structures are not up to this challenge.