Oh puh_leeez cogitator. Their models are crap and they know it. They may be the based on the best knowledge of today and using the most powerful computers, but they are still in the infantile stage of understanding global climates. I would bet my life savings, which is substantial, that we will be at the lower end of the predictions or lower. Their midrange numbers and high numbers are pure whackology.
I'm not a climate modeler, but I fully understand what GIGO means. And even the lesser-known IAGO (Incomplete Analysis, Garbage Out). If it would be possible for us to ascertain the outcome, I'd take the bet. Still, based on everything I've assimilated, I think we'll see a 1.5 C rise by 2050. And I may even be around to see if I'm right.