You are right, and it's true AR works smoothly in huge resolutions in a powerful workstation. What I want to say is exactly that, only a minority requires that advanced features, but they need! and they are the professionals, that's because I said if AR is only focused on "non-professionals" it's only for fun for professionals.

I work sometimes in 16000x16000 and works smooth, only to save the work is a pain... it takes almost 3 minutes...