If you want specifics I can do that. While it is very true Nintendo games have not changed we can pretty much all agree on that, the industry has changed. Gamers have grown to expect bigger and deeper experiences. Nintendo games are still fun, there is no denying that, if you gave me a Wii U for free I would probably play Mario 3D world and DKC every day. But that is not enough for me, I want more, and here is my problem, if I get a Playstation I know I am going to get the major games I want, Castlevania, Street Fighter, Mortal Kombat, Resident Evil, Ninja Gaiden, Final Fantasy, Devil May Cry, God of War, Ratchet and Clank, Gran Turismo, and on top of all that I am going to get brand new experiences that I have never played before. I am going to get a machine that has ZERO limitations, it pushes technology to the limits, it has a fully integrated and simple online infrastructure that allows me to connect with strangers and best friends in a single instant, none of those things are true with Wii U, if I want to play a game online I have to KNOW the damn person a head of time, I have to trade friend codes with them and then I have to play on unreliable servers because Nintendo refuses to invest properly.
When I had a Game Cube there were very few games I couldn't get on the machine, sure there were a few I missed out on, like the FF, Kingdom Hearts, and a few others, but for the most part the games Game Cube had to offer were sufficient. I was okay without Final Fantasy because I had Star Fox Adventures, I had Tales of Symphonia, I had Crystal Chronicles, I had Zelda Four Swords, I didn't have to miss out on Mortal Kombat I had it day one and despite being a delay on Deception I had that too. I had Soul Calibur 2, I had Smash Bros. Melee and I had about five or so DBZ fighting games. Then I wasn't so upset that I couldn't play Silent Hill 2 because I had the best Resident Evil games I could get, if I wanted it I could have bought Eternal Darkness and had a similar experience and with Resident Evil 4 and REMake I was all set.
With Wii it was different, the best I could get was a handful of typical Nintendo fare, which to be honest were still good games, but I really started to notice the gaps for the first time, even with N64 there were droughts but there were not that many gaps, just about any major genre and franchise was available, RPG's were not but I had a PS1 for that and was just fine.
Now it is even worse with Wii U, there is not ever going to be a Mortal Kombat ever, Warner has already stated this, even though there is a brand new MK game in the works. There is a Super Street Fighter IV, the entire Tekken and Soul Caliber franchise missing from the Wii U line up, well unless you count a spin off that is just one game. The Wii could have been the console for FPS games and instead it turned into a dumping ground for mini game collections.
MY personal biggest issue despite the lack of games is the damn price, an issue I also have with PS Vita and 3DS by the way. I was aprehensive about buying a DS because it was a mere $30 more expensive than previous hand helds, the 3DS has been out what three years and still hasn't even dropped to what DS launched at, don't give me any inlfation BS because Nintendo kept their consoles and hand helds priced the same for two decades, Sony seems to have learned that lesson too. Wii U costs fifty dollar less than a PS4 and is technologically on par with a $150 cheaper PS3 with a vastly superior library. I was OKAY with buying a Game Cube at a reasonable price because it was on par with the competition and it had a decent selection of games. With Wii the machine didn't have nearly all the games I wanted, and to be honest the ones that I would have enjoyed came out AFTER I sold the damn thing (hence why droughts are a BAD thing you can't string people along forever) but despite the lack of games it was reasonably priced and the virtual console gave it added value, at least for a couple of years.
With Wii U the virtual console is a damn joke and aside from a very small handful of Nintendo remixes most of the eShop games can be had elsewhere already. if Wii U was priced let's say $200 right now I might get one but for what I get it is over priced and for the most part there is no value, the few games it does have might be the best damn games ever made this gen, but there are too few of them to justify a $300 console considering that 9 year old consoles with huge libraries and comporable tech are for sale for less and the next gen consoles are vastly superior techwise and library wise and are not that much higher priced. for the value I can get a PS4 for a hundred dollars more, pay the same price for games,a nd know that the industry is commited to the machine, at least for the forseable future. nintendo may or may not be commited fully to Wii U but the industry has moved on the consumer has moved on and why should I spend my hard earned money on a failed machine? After the fact Sega President made a claim that marketing the Saturn was damn near impossible, it might not be a direct comparison but I think five years from Now Iwata will be saying the about Wii U.