I do agree that the whole digital initiative isn't living up to the promises. I was totally sold by the promises, and now, i just want to keep my books. Wizards have a long history of poor online products(magic online fumbles anyone?) and they started DDI with a huge wrong foot.
The content is good, but i think it is to few. Its all in PDF, the Compendium is far from great(I miss d20srd), the Character Visualizer and the Game Table were the big promises last year, and they are still delayed. Much like magic online 3 ¬¬
The 4th Edition? Its top quality, I'm having a blast DMing D&D again. The promised digital side(promised in the books! Look at the end of PHB)? I'll Pass. At least officially.