William, perhaps Wolfram Cloud is somethings along the lines your wrote above?
I can still see three problems:
(1) There is a concern that people accessing my work might start costing me money. Wolfram Cloud costs does it not?
(2) There is still no iPhone/ iPad front end.
(3) Most of my work, and I would have thought other educators, seems to be stuff like graphics and user interface rather than deep mathematics - therefore having a powerful engine in the cloud isn't much help. What I need is an easy way to deliver graphics and text (produced using mathematica) over wide platform at zero cost other than a predictable original license fee.
This discussion: MOOC based on Mathematica - maybe of interest to you gentlemen.
Kyle Keane and I will be presenting this at the WTC in October 2015. We made good progress and are very excited about showing our work to the Wolfram community who are engaged in education.