and we will have a really low power consumption for people around the world.
Why should consumption be lower? People will just add more asics or FPGA because right now electricity is the limiting factor. So there's no way global consumption will reduce.
Dude, there is not a unlimited storage or production of FPGA's. There are only a few FPGA's currently on the market and look how much GPU's are floating around the globe. Im not sure about the amount of FPGA's, but Im sure that if we have just for example 10 Million GPU's there will be only like 50k FPGA's.
So just calculate that again, if the FPGA's only take 150W and one GPU 100-300W depend on the model!
I agree with you and believe that FPGAs are a good step towards reducing the total energy consumed by crypto mining, as well as being a viable alternative to ASIC monopoly. The only problem I have with FPGAs is that they are more or less CENTRALIZED.
Why? Because getting an FPGA to mine crypto is technical. Not everyone, most especially your non-techy people, will be able to configure and run an FPGA. Although in the future, devs may release an extremely user friendly software for FPGAs, that is a long time further and besides, the cost of a single FPGA is also restrictive. Point is, FPGAs could be harmful to crypto blockchains because of the centralization of hardware to companies/individuals with deep pockets and who know how to use them.