Granted there is risk in FPGA
But this takes some power back from asic manufacturers who are most likely running equipment like this or better.
once these can be scaled down nicely, they will replace gpu's entirely. and this was always going to happen. Gpu miners have already cut back on spending and will likely be deciding whether to get more invested into it, or less. The days of getting into mining at home with your 1 or 2 gpu's is not over, smaller cap coins with their own algos will get away from FPGA until they get big, just like ASICS.
Ultimately we will just have a middle ground between gpu's(hobbyist) and ASICS(large scale). and this first batch of miners will make a very small dent overall compared to asics for the next 6-12 months, So there is still time for gpu miners to all get their ROI.
But I would rather side with FPGA to slow down companies who use asics in house before releasing to market for massive gains