Since climate science really is a science, it's going to have to make predictions. It's good to put consensus predictions on record and then see how good they are. I have enough faith in climate science to think that they will be quite good. Of course they will have big error bars, but that's unavoidable. Also, it's not uninformative. I think it will be important in 5 years to say: We've got a climate model that's made correct predictions for the last five years, so you should trust that model as a good guide to the future. It's not a perfect argument, but I think it will be more persuasive than what we can say now.
Your optimism is no doubt fueled by all the most recent publicity the rigor of their scientific method has garnered.