With no particular evidence to cite I project that at some point there will be a level off of the increase in TH/S and difficulty. I am a very small miner now (8GH/s for BTC and 730 KH/s for LTC) but if I can hold on to my .2 BTC per day production throught the ASIC boom I feel like I will come out OK on the other side. If not I will have a bunch of ASIC boxes that at least paid for themselves...
Maintaining your percentage of global hash rate is a great strategy for getting through the spike as a profitable miner. Its the flat and downward parts that payoff handsomely. I can't wait for the next difficulty decrease, even if it takes a couple of years to get there again. A major crash in BTC/fiat would facilitate that nicely, but at a very high risk to entire offering.
On this side of the spike, its tricky estimating the probabilities that new hardware will ship and when. It seems that everyone so far has missed on their heat/power estimates. I don't expect that to change and will likely push units out a couple of months. Even the USB Sapphires came in at 510ma draw if I remember correctly.
BFL has already faced that battle and adapted. I'd love to see an announcement of an outsourced agreement for assembly and testing.
Bitfury has already come to terms with missing their density projections if I've followed that thread correctly. I'd love to see more clarity on the counter party risk for the rest of the world since it is "russia only". Metabank is the intermediary right? It seems they will hit October 2013 at this rate but with an unknown quantity.
KnC is an unknown so far but has the highest density on the books. They recently posted some slides showing a simulation of their cooling solution if their chip were to ever hit 125C, which they don't expect it to do. (I would hope not). The large BGA package is worth noting since BGA does not do well in thermal cycled environments. A working chip with 3rd party verification would be nice here. Followed by some kind of announcement on where they are setting up their supply and manufacturing chains. I'd put them at 100% delivery by March 2014 without knowing more.
Avalon DIY seems to be landing at 350MH/s or so per chip, less than the 450MH/s theoretical. I believe there is a water cooled board that runs at max, but I haven't kept up with that thread. I think these things will start arriving in August 2013 if the April Avalon chip orders are any indication. There is also a crazy 107GH/s Avalon miner in the Chinese boards thats worth looking at.
AM is out far ahead of everyone and I expect them to put serious pressure on the price once competitive units emerge into reality. Especially if they can kick out a 65nm product before the end of the year. All bets are off if they announce an acquisition of someone else's IP and they stuff it into their manufacturing chain.