It's true that our first 3rd gen design is targeted large scale deployment. However, if the market demand will exist, we might create a smaller form factor.
It took us less than 2 month from decision to a working SP20 prototype.
It all depends on many variables (bitcoin price, difficulty, improvement in specs, etc.) as to whether it will happen or not, but my plan has been to mine on my SP20s for a few more months before reselling them for the next generation of SP hardware. A planned resale is the only way to even approach ROI (or at least reduce losses) with the current generation, so the whether or not there is a suitable next generation may mean the difference between mining or not soon. To hear that a next generation may not be coming for home mining is disappointing, but I do understand completely.
Just an observation about my preferences should you consider the smaller form factor:
In my case, except for my first SP20 (which I bought an EVGA supply for), I've been buying 240V server supplies from eBay and modding them ($30 per 1200W supply and <$10 in parts to mod... nice). The ability to do this has made for substantial price savings which would be nice to carry into the next generation (it was the difference between ordering a nano farm or not). That said, it would be nice if the target power consumption for the next gen home miner stays around the same 1100-1200W to use these supplies (but with improved hash rate at that same consumption).
If it were possible, I would alternatively certainly consider moving to the rack mount form at home if it could be ordered at a lesser cost optioned without the built in power supplies. Perhaps a compromise could be made where the rack form factor includes 12VDC jacks or screw terminals for those who want to order it without the power supplies and to provide our own supplies? I know it would increase your BOM on the model, but it would allow the same form factor to serve both applications.
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