A real loss to the movie loving community. He was signed on to do another Living Dead movie, which won't happen now.
Ol' George messed up the copyrighting of the Night Of the Living Dead when they changed the name from Night of the Flesh Eaters, so he never got his fair share when it went big. Luckily he made some dough from the sequels.
Unfortunately, The Walking Dead probably stole his legacy so most of the millennials and whatever comes after them won't realize who gave the zombie genre its real start.