The greedier ASICMINER gets, the less profit they make on each coin, that's because their energy costs rise as fast as they add gear. At some point they wont be able to pay a dividend as all their revenue will be going into running the bloated ASIC farm, for roughly the same number of coins each week. Then there is a good chance they will have to close up shop, leaving a lot of worthless shares, but also that means 1,000TH/s+ suddenly disappears from the BTC net hash rate, and confirmation times blow out until ridiculous, effecting everyone.
Best possible scenario imho. I've got nothing against any ASIC manufacturer... but the concentration of hashpower in a nation where property rights are... marginal at best worries me... Then again, China is kicking the rest of the worlds ass on the whole 'following free market economics' thing. So I guess I'm not as worried as I would be if ASICMINER were located in the USA or EU.
I can just imagine that headline now... DHS seizes asicminer warehouse and kills bitcoin.