At $8 per GH that would be $216,000,000 in hardware. (Monarch & Cointerra)
At $15 per GH that would be $405,000,000 in hardware. (Hashfast)
At $20 per GH that would be $540,000,000 in hardware. (Bitfury October)
At $50 per GH that would be $1,350,000,000 in hardware (BFL, AsicMiner, Avalon, Bitfury August).
Possible but unlikely.
And with a single post you have me turned 180 degrees on the profitability of mining. It kind of puts everything in perspective, doesn't it?