The last time CO2 was this high (before that chart starts,) the oceans were several meters above current levels and the earth was significantly hotter. It may take several centuries for the full effects to be seen and it may trigger a runaway effect as massive amounts of CO2 could be released from permafrost and other CO2 sinks. In the meantime, hurricanes and other weather extremes are likely to become much more severe. I won't be moving to Florida. It may not even exist in its current form 50 years from now. Parts of some low lying cities are already being flooded at low tide.