Whats going to happen when the difficulty reaches 150 billion

[grantenierman]

that number is going to scare away some of the home developers and at this rate is coming fast. the new machines are 5,000 if not more for more then 3 THs + whats going to happen to home developers and these new machines will we see a repeat of what going on with usb miners the old machines will drop in price and so will these machines basically this is the new generation mining.