I'd like to say that this was - was - an intelligent well made movie befitting it's time, and that that time has passed and, alas, it has not aged well. I'd like to, but alas I snuck a peek just moments ago at Roger Ebert's then-current review, and find it is what it was: a well intentioned story bogged down in the ways of that age of storytelling, no less compelling today than it was then.
Of late, the then-uncredited novel "I Am Legend" has been remade into a telling a bit more believable. A bit. The core difficulty with this story, aside from creating a convincing world for the protagonist and all the technology and talent needed, is getting the zombies right. Heston's foes were too smart to be that stupid, and Smith's foes were too dumb to be that smart. The rest of the tale then struggles to cope with the resulting cognitive whiplash.
Given the intelligence and wit of "World War Z" (movie version pending with trepidation), I'm exploring the zombie genre in hopes of finding comparable competence. Some, like "The Omega Man", are obligatory viewing in this study. Obligatory, however, does not denote worthwhile.