artists and celebrity

We've been talking about celebrity culture and we've been considering dominant and marginalized culture.  Generally, artists are perceived as part of marginalized culture--not akin to celebrity.  Of course, there have beene exceptions like Andy Warhol.  Here's an article about two contemporary artists who are in the public sphere; who are becoming a part of dominant culture.  What do you think about this--what does it mean for an artist to have a "factory" where their art is produced by workers?  What does it mean that they are likened to consumer brands?  What do the phrases superart and superartists mean?