If some readers appreciate it and other readers can choose to ignore the enhanced elements (to enjoy a more traditional read), then it sounds like a great idea.

My only concerns would be that the added productions costs would legitimize the sky rocketing cost of ebooks and that non-standard ebook formats will proliferate. But that doesn't appear to be the case here since this edition is differentiated from the regular ebook edition much like a hard cover may be differentiated from a paperback.