ET3D: I think that the decreasing PC selection is because consoles bring in a lot more sales. PC gamers have largely moved to downloads and PC sales of games are typically lower than consoles anyway. It's probably no big loss for the stores to remove the PC section.
Gaming stores rely on a steady flow of used games to make the real money, which of course doesn't apply to PC games, so their disinterest is quite understandable.
General-purpose stores that don't do trading will generally have a much larger selection of PC games since a PC copy sold is just as profitable as the console versions. In my city the local Dick Smith Electronics has PC games taking up at least as much shelf space as any one console if not more (with budget titles and compilations in racks nearby). Retail is also generally cheaper than digital here (due to Steam etc. having artificial price increases for overseas buyers, unlike GOG) and these days they mostly all activate on Steam or whatever anyway.
