Just got back form my Costco Ron, and it's as dismal as yours. One standing display of Cars 3 and NOTHING in the former Blu-ray/DVD section except for War for the Planet of the Apes and Spider-Man: Homecoming. I think that any meaningful selection of physical media at Costco is officially dead:
My Costco has none of those Blu-ray titles Malcolm. Disney makes up about 80% of the meager selection they do carry right now and since I'm not buying DVD any longer (haven't in years), those don't interest me. Maybe things will pick up with the holidays upon us.
I stopped by my local Costco a couple of days ago to check out the Blu-ray offerings. Not a single Criterion anywhere, and almost everything they had on the shelf was a Disney product. Disney seems to have taken over. They had a few 4K Ultra HD titles (Man of Steel, Batman v Superman, Flight of...
One of my local Costco locations (Mesa, AZ) had a pretty good Criterion selection today. I picked up The Graduate, The Manchurian Candidate, and In a Lonely Place for $60 plus tax. Woo-hoo!