Yes difficulty reaching >1 trillion is highly likely.
I would point out that even with
free hardware, $0.10 electricity and <1W per GH the exchange rate would need to be $42,860 per BTC. In other words miners would be paying $42,860 in electricity (or more if they have less efficient rigs) to mine one BTC.
Awesome analysis.
If people were waiting until hardware was available to purchase then you would be correct. Do you think all of these pre-orders are going to be delivered and not used?
Eventually the exponential network hashrate increases will level off and stabilize. The problem is, I don't believe these devices will ROI before that happens. Sure, you'll be the only one making more than electricity costs, but it'll take you years to break even.
Damned if you do and all that...
edit...
Do you really want to spend 15k on a product that MIGHT break even, and even if it does will only barely cover electricity costs until 22nm <.6 W/Gh technology hits the market? The bitcoin space has more lucrative investment possibilities. This is a loser at the current price point.