I believe that one of the problems is the technology. As a company, you must sell what the market can pay for (i.e. Wii), instead of push the market to buy something that in the end, the company can't afford without losses.
Some devs and hardware manufacturers have great long plans, but the market is changing. For example, I believe that in 2006 the right tech was Wii. Now, the market has changed and is ready to pay for better tech like 360 or PS3. That's why Nintendo is releasing something like Wii U.
Furthermore, Nintendo has stated that HD development now has reached a more affordable cost and time investment, telling to investors that the Zelda demo was made by the Zelda team relative fast, so they don't have anything to worry about it.
At least is what I think.
Proud to be the first cool Nintendo fan ever
Number ONE Zelda fan in the Universe
Prediction: No Zelda HD for Wii U, quietly moved to the succesor
Predictions for Nintendo NX and Mobile
