Essentially, the value in the Bitcoin economy is being sucked out by ASIC manufacturers.
That very well could be a valid theory. The miners are convinced that there is a decent chance of spending 1 BTC today and earning more than 1 BTC over the next year or so as a result. It's a gamble because nobody (except the manufacturers themselves) knows how many Thash/s are on order -- but gambling never is a rational act.