Not really, everybody else was content with VGA/DVI (infact Apple used VGA and DVI on the Sawtooth's cards)and Apple used then unassigned pins in the AGP slot. If Apple had pushed this to the people who were coming up with the DVI spec it still would not have happened because it would have required modification to the AGP spec as well. Then you run into cheap motherboards not providing enough power or new displays coming out that would draw more than could be supported, etc.

ADC might be neat if it was more common but it just does not work in the long run unless you have complete control over your hardware and force people to upgrade their whole machine.(or at least their mobo and GFX card at the same time