The purpose of these exponential growth projections is to help those inexperienced with bitcoin network difficulty realize that what they should be focusing on is BTC return over the lifetime of the product.

Considering the risks associated with any pre-order it is time that manufacturers also consider the customers situation when pricing the $ value of the unit.

Avalon did it well on their first and second batches pricing wise vs number of units to be sold. Wish they would have been able to deliver them in volume.

Here is a link to something that I feel is my optimistic view as respects network difficulty.

http://btcinvest.net/en/bitcoin-mining-profit-calculator.php?diff=249506922&dcosts=31200&diff_mincrease=35&blpbtc=25&dhsmhs=2200000&diff_mincreasedecrease=3&btcusd=140&dpowcon=2400&btcusd_mincrease=3&pcost=0.13&calcweeks=25&dleadtime=0&action=calc#

Please understand that an exercise in awareness rarely is doing disservice to others.