Firstly, why would you assume you would never be able to buy it?
Secondly, it might not be directly relevant to people like you and I initially. If instead something like this could be cheap enough to bring to the massive billion(s) of people with no power or light at night -- that's huge. Once it's ready, and I'm nearly sure it eventually will be (solar in general), then it'll be ready for us to consume.
according to a rerun of the a speech by the australian climate change commissioner to the national press club i watched a bit of yesterday, depending on where you live the current cost curve of solar energy will place on par with brown coal in 2018.
technological development will only accelerate change.
Who cares if they discovered it if I can never buy it.