As a heavy multitasker who would only consider 32gb+ on an intel system, my question is not whether 8gb or 16gb, but how 16gb (which is the only spec I would consider) compares to 16gb on an intel model. With this unified structure, will I not run into bottlenecks as I would on an intel mac or PC? This seems like a more useful question. People should always get more RAM if they can IMO (at least until you're above 16-32, then it's overkill for most - but again, I don't know how this new structure impacts things).
I think the 14 inch coming later this year will be more up my alley but I'm working from home for the next 6 months and need a new computer now.