In fairness a lot of hardcore PC gamers avoided Steam for a long, long time because they didn't like it or had limited internet access/poor connections or so forth. I was one of those people myself.
Anyways as Quin said it's just a platform. I play a lot of games with my Xbox 360 controller. There is absolutely no difference between playing, say, Skyrim on my PC and playing it on my 360, the PC is just slightly more convenient for me. It's still the same game.
Now can we get back on topic? xD