That is true. I do not want to make it a habit of writing Ernie all the time, but I asked him about that. He most likely will come back with the exact same answer you just produced, but what the heck.
I believe there is a working prototype. At this point, they are in the testing phase. The way the news was articulated made it seem that it clearly has been developed but they are doing a lot more testing for various integrity, durability, scaling, output, and more