I searched this forum and didn't find a topic that quite fit to add to on this subject.
At least in my area, I've noticed hobby stores either disappearing or being in places that are inconvenient to get to if you live outside that city. Some of the slack has been absorbed by bookstores, and I've seen that expanding: I've seen model kits at the local Barnes & Noble. Ann Arbor: parking is the issue.
Because I grew up in Ann Arbor, I was a frequent customer of Rider's. It wasn't always RPGs, in the early days it was model rockets, and I lost more than a few to midair explosions.
My main concern now is where to get other tools of the trade, such as Xacto knife blades (or even the knives themselves) to trim flash from miniatures: Joanne's or Micheal's maybe? The Internet is great and all, but it's also nice to have someone with the same interest working at a store who can make recommendations for you.