why would they do away with silver? So I have to pay monthly or yearly just to play single player games?
Exactly. With cloud computing they're already blurring the lines between what is an online game and what is an offline experience. If they are going to redraw the lines they will undoubtedly err on the side of requiring Gold. I mean, we're already being told you basically need the internet for the system to function at all for games, and they've always locked internet functions behind a paywall. The implication is certainly there, even if they're terrified to say it out loud.
Seem what he was saying to play online ftp games you must be xbl gold. Which makes sense if you think about it....
That's the case on the 360 right now. The few free-to-play experiences available all require Gold membership, even the new Doritos Crash Course game.