It looks like Apple is trying to get back into the media race with providing CUDA straight out of the box. They've made a few mistakes over the past few months that has divided the population, but now that their hardware is coming natively with nVidia cards, we can start to expect seeing more people support their editing decisions on the iMac platform- especially with Adobe Premiere and After Effects.
As for Resolve, I imagine it'll run with no problems. Whether or not it'll be an effective and real-time platform for grading remains to be seen; maybe only for SD/HD workflows since it only has one internal hard drive and limited RAM. You can only fit so much into that thin of a case.