I was just wandering around a local GameStop. It took me a minute to find their PC Gaming section – and it was tiny. They had a 3 foot x 3 foot section for PC games priced at $20 or less (apparently inventory they’re trying to clear-out), and an even smaller section for regular-priced PC games. It was literally about one foot of shelf space for all their PC games selling for $30 or more.
I asked a salesman about this, and he said that between piracy and download services like Steam, there just wasn’t much of a market for selling PC Games.