With McGraw-Hill's CEO for all intents and purposes confirming this product to be real and running iPhone OS, I'll be very surprised, and saddened, if a shut-tight, app-store-limited device like this will lead to world domination.<p>Are tightly closed environments like this where we want personal computing to go next?<p>Are only a small number of people going to own powerful computers with which they can do anything they want, with the rest going through app stores and the cloud? It sounded good to me before, but now that we may all be on the receiving end, it seems disheartening.