I doubt that's really the cheeseburger in a can. It looks way too big and fluffed up to have come from a compact can like that. it'd probably be much more suished up, and resemble cranberry sauce, with the indentations of being inside the can.
To me, this isn't too disgusting. Not great, of course, but not as bad as you'd think. It's basically bread and a beef patty with cheese on it. If they can sell brown bread in a can, or Campbell's soup with pieces of hamburg in it (or Spaghetti-o's with meatballs), there isn't too much ick factor here. Not that I'd eat it. Seems more like something to eat in a bomb shelter or bunker after the appocalypse, though.