Blockchain has been implemented at most of the fields these days. Energy sector is the best one to get this implemented and this will have huge reach including common man to be honest. Bittwatt is going to play an important role in this energy domain as their project focus is one of the best that I am seeing these days.
I wouldn't say that blockchain technology has already been implemented at most fields. Yes, there are already projects that want to implement blockchain for a huge variety of fields but it's still in its early stages when you look at a wider adoption. The energy sector is predestined for the use of blockchain and I am sure in 5 years (or something like that) from today we will see it almost everywhere.
You're right, the technology is a new one and there are still a whole new areas that are uncharted, giving room for limitless possibilities, streamlining that to the energy sector which this project is based, there are a lot of issues that needs to be fixed like the energy exchanges between traders (or producers) and suppliers which takes days and at the moment, there's no decentralized project for this, this is where Bittwatt comes in