The Main Column Width is 1200 Pixels !!!!!

Arf! Arf!

I just switched my main site to this theme from a Bootstrap 3 commercial theme, because Kelly provides a wider screen display which I prefer. There are quite a few non-WordPress websites on the Internet recently, with edge-to-edge displays that look really nice. WordPress developers seem to be creeping slowly in that destination, but for whatever reason continue to limit the width of a site’s main content. They will design a theme with a Full-Width Header Image 1600 pixels wide, but then shrink the main content width itself down to 604 pixels (Twenty Thirteen is a good example). I guess there is a reason for it, but I don’t get it. I’m hoping Kelly is a move in the right direction for WordPress developers. Many WordPress Themes look like a 8 1/2″ x 11″ piece of paper on a blackboard………NOT Kelly.