What does 'baring the unknown' mean? Discounting unknown variables, NOTHING can be predicted. I'm not claiming the gist of your question is invalid, but these two sentences are:
Do you think price will hold above $10 between now and then baring the unknown....nearly a meaningless exercise, like predicting the weather next may 7th
We can expect the inflation rate to be immediately halved about 18 months from now. The annual inflation rate is above 25% today (based on my back of the napkin estimates below) and will instantly drop to about 11% (annually) in some hour after Christmas 2012. While this could produce an immediate 'shock' releasing selling pressure, it is predictable and represents a smaller average inflationary deceleration than we've seen over the course of all previous years. All things being equal (and blind), prices should immediately rise.
However, miners do not sell immediately after producing coins and demand (traditionally) has far outstripped supply. Some sophisticated graphics might demonstrate a statistically significant increase in prices months after the event, but frankly, I don't think anyone's eyeballs will notice.
It is worth noting for giggles that 21 December, 2012 is the Gregorian date that the Mayan calendar will enter a new b'ak'tun (394 year cycle).
Annual Inflation rates (estimated from first day of each year, please correct me)
52500 x 50.0 =100.0% 2009
52500 x 50.0 = 50.0% 2010
52500 x 50.0 = 33.3% 2011
52500 x 50.0 = 25.0% 2012
52500 x 25.0 = 11.1% 2013 <--- Dec/January
52500 x 25.0 = 10.0% 2014
52500 x 25.0 = 9.1% 2015
52500 x 25.0 = 8.3% 2016
52500 x 12.5 = 4.0% 2017
52500 x 12.5 = 3.8% 2018
52500 x 12.5 = 3.7% 2019
52500 x 12.5 = 3.6% 2020