Alright why do we need a WiiHD?
Right now walk into any technology store (FutureShop/BestBuy...etc...etc..) and try to find a normal TV under 720p resolution. I bet you won't be able to find one, why because HDTV is now the standard and most retailers won't even carry standard definition TV's anymore. Sure you can still find standard TV's for sale at your local Walmart/RealCanadianSuperStore. But HDTV's are the new standard.
To help prove this look at your local BestBuy/FutureShop and see how many BluRay's are for sale opposed to DVD. Right now my BestBuy is probubly about 60% BluRay and 40% DVD. I noticed the BluRay selection in many stores are beginning to rise and DVD is starting to get phased out. HD media formats are beginning to control the digital media format market.
Hardcore gamers wanting HD and not casual. I find it pretty funny to say that only hardcore want HD. The hardcore demographic isn't the only demographic for HD. I'm sure millions of casual gamers own HDTV's. The only differance is casual gamers probubly don't realize that the Wii is such poor resolution. Casual gamers don't educate themselves about the console wars and probubly don't realize the disadvantage they face to have Wii over PS3 (From an HD standpoint).
Then the part about the hardcore liking the release of the Wand and Natal and probubly not picking up a WiiHD anyways. I'm a hardcore gamer and I still play and own a Wii. I would pick up a new WiiHD anyday when compared to NextBox or PS4. So your theories are a bit warped!