I totally understand why creators are choosing to use streaming media as their distribution method. From a business standpoint, it most probably results in greater profit, better way to protect the material from pirates, etc. If I were them, I'd do exactly the same thing. More power to them.
The pricing model here also seems like an amazing deal, given the presumed quality of the material from two respected creators, plus the bonus DVD. I'll probably end up buying the package myself.
My only concern with the streaming model (not necessarily D & D, but in general) is: what happens to your investment if the company that distributes the material goes out of business? Unlike a physical book/DVD, it's seemingly gone forever. We've all seen too many businesses and performers go bankrupt in this cottage industry, so I wonder if the streaming companies have contingency plans for the material if they fold.
I suppose that one could say you are just renting the material for a period of time (i.e. from the time you buy for as long as the company stays afloat) or that you really ought to learn the stuff you buy right away.
However, looking around my office, I realize I don't know half the stuff I own, so it's not a realistic option.
It's also why I should probably stop buying stuff. (Fat chance!)
(FWIW, I meant no criticism by my remarks of D & D, Mr. England, or Mr. Wilson. Just musings from an old dude)