Disagree.. The show had huge impact on values and exposure
Furthermore, yes walking dead is a great story.. But that's it.. Its not an original IP, just an original take on a zombie apocalypse with characters we cared about but I don't think many will feel pangs of nostalgia for like a superman or wolverine when they disappeared from public view for a while.
WD #1 will remain significant for being a major part of this era and the cultural influence it had which will give it good sought after value, but I doubt it will ever be a true long term high demand highly priced grail like a hulk 181 etc.