We should not forget that we are in inflationnary phase. A lot of bitcoins are created right now, and will be until 2013.
So unless we have an even bigger and faster increase of user base, bitcoin value should not increase that much.
So even if it seems that the market wants to see the BTC/USD parity, we have to expect a big correction after this happens.
I think you're greatly underestimating the growth of the bitcoin economy. the monetary inflation of bitcoin is NOTHING compared with the growth in demand. Growth is exponential at this stage because economic growth is proportional to economic size: The more bitcoin is used, the more people will want to use it. This is true because bitcoin is awesome, as we all know.
Sure, there will be double the amount of coins in 2 years (or whatever the numbers are), but there will be hundreds of times the current demand as well. Just look at how the value has increased over the last few months. You think this will likely flatten out, I think it's much more likely that it will accelerate even more
and continue to do so, almost until bitcoin is universally adopted. Unless, of course there is some terrible catastrophe which sends the value of bitcoin to zero.