So, I'm assuming the RMAH is going to boil everything down to this:
If it's good, it will either sell for real $ or for VERY high gold amount.
For those who don't want to use the RMAH, if you happen to get your grubby hands on something good because of a good drop, you could become gold rich by selling it... but then in turn, after this occurs over and over again over time, gold is going to be everywhere, further increasing the costs for items on the GAH. Newcomers, who buy the game after it has been out a year are going to be SOL when it comes to equipment purchases then because of starting with no gold?(unless using real $)
I'm sure there are more pieces to this puzzle that I'm not seeing. You have gold farmers and bots involved as well.(which I'm guessing are either going to destroy it all or have to close up shop because they fucked up their own market with over-saturation somehow) It's going to come full circle several times with prices being mucked up.
And then the interests of players to even keep playing the game will come into play. If people stop playing in mass things will stop being bought. And you also have to consider that nothing in the game is actually consumable, it can all be recycled into the auction house. I have a feeling that this game will only play out for as long as Blizzard keeps putting out expansions; as long as they keep a step ahead of the mess we'll continuously have something new to grasp for.
I have no idea. lol.