Interesting. If someone can get over the financial hurdle of making bulk ASICs their $/MH will in theory be so low and their MH/W so high that they could force out the vast majority of current users given enough capital. Could make for a very interesting future IF this were to take off. If they were the only ones with access to very cheap and efficient hashing power it could in theory break the network.
Would be fun if the next currency that cropped up rendered their ASICs useless
That is what I find interesting. You can't get a dominant technology and hopes to takes the mining market, because you'll break the network and the market. You can aim under 51%, but if you consider the ups and downs of the network, I doubt you can get over 40% safely. If you get 40%, and the network goes a little down, you could get over 51% by accident.
Let's say that this guy play safe and goes for 30% of the market. At the moment, he would go for around 4-5 THash/s, pushing the network to 15 THash. Yeah, there would be a jump in difficulty, but not that cruel, and still 70% is available for the smaller miners.
ASIC is far from a panacea. You can't get too much, because you break the network (and you don't want that, because you have to pay back your ASIC). But you need to get a good chunk of the network, so you can profit and pay your ASIC. You have a ceiling in revenue that you can't go over.
At 30% of the network, you get 2160 BTC every day. At 5$ each BTC, you get 10 800$/day, hoping for 3.9 Millions/year. BUT, the more you sell, the more the price goes down. And when a guy with a lot of BTC sells, price crash hard.
So, with the magic ASIC, you have a limit in revenue, because you can't get too much of the network. You can't sell too much, because you'll crash the price yourself, and lower your revenue. And you still have to cover your cost. How much cost the ASIC? The bunker? The maintenance? The electricity (even if its supposed to be cheap, 5 THash will still cost a good chunk of electricity)?
I wish him good luck, but it's far from being the ideal business opportunity.