Originally Posted by DebianCoder
They only need their one monitor to function and report correct values to GNOME/KDE.
Why do they need that exactly? Why does an average user need to know the refresh rate of their monitor? And even if they do need to know, they don't have to become xorg.conf experts, they just need to open nvidia-settings, the correct rate is printed there.
Think about it this way: before, users needed to be xorg.conf experts if they wanted to plug in their TV and watch a movie on it. Now, they just plug the TV in and DinamicTwinView will do its thing. It's definitely better for this to be on by default.