It's like saying that there will be no more exciting music and it all pretty much ended with Mozart and Beethoven. And one thing that is very consistent for human kind (with few very bright exceptions, of course), is the poor ability to predict future innovations and technologies. If you look at 100 year old drawings of year 2000, you will see flying steam engines, coal powered robotic maids and biplanes used for public transportation. So.. let's just wait and see what happens. A cure for cancer may be just as exciting breakthrough as electricity was in its time, and it may as well be just around the corner :)
This says nothing about any auxiliary lights you choose to mount, though. Still, I guess this thing would be illegal in Germany simply due to the fact that lighting on a vehicle is very rigorously specified and I guess the green colour won't fit well with the laws here.
I guess I'll opt for a very bright (hub) dynamo-powered light instead, but my main concern currently is not visibility but that I can still see the ground when there's a car coming at me with blinding lights.
(Side note, anecdotal evidence: No cyclist I know ever had problems with the police for using battery-powered lights instead of dynamo-powered ones. Most of the time they're happy when cyclists have light at all.)
