Earlier quoted context omitted.
Is the constraint still energy storage?
Toomuchtodo did too much better than I could answer! I will add that I think a big challenge would have been transmission, but that was in the model of more expensive solar panels in remote sunny areas. If we can really plaster the world with non-toxic, thin films that produce some energy, that stops being as much of a barrier.
You are too kind :) My day job is DevOps/infrastructure, but I'd love to move into the renewables space. Its our generation's moon shot.
If you're at SolarCity, Tesla, or any other company that is working on engineering dispatchable supply or demand from distributed resources, get in touch please!