As for the Steam issue, I'm sure I read somewhere that Gabe Newell said if Valve ever had problems (I don't see that happening any time soon, though...) all the games would be made available, so you wouldn't lose anything already purchased. There are other digital distribution platforms besides Steam, though. Use those. GamersGate is pretty good. Let's not forget Amazon and the like. Steam isn't suddenly going to swallow up all the competition because Game is gone. The very thought is laughable. Game's been failing horribly for years. The place was a ghost town every time I walked past.
Especially on the PC front

I think PC gaming is becoming larger at the moment due to the aging consoles not getting their limelight with "Next Generation" hardware. I think this lets developers play around more with the concept of PC games or at least decent ports, which also then preps them up for the next generation of console development.
I don't think Steam is going to eat up much of Game's missing sales as probably 80% of PC gamers who purchase stuff from Game don't tend to use Steam much at all.

