In retrospect, Nintendo are the only ones who are still making great games -- I mean, they were they only ones willing to fund Platinum for an awesome game like Bayonetta 2. There's a lot of good games on the 3DS as well, while Sony & Microsoft are basically doing what Nintendo did with the Wii -- Faffing about with stupid gimmicks and irritating social media mechanics as opposed to a strong third party support like the days of the PS2. Nintendo might have been busy releasing basically the same Zelda or Mario games lately, but they know where their priorities should be. At the games. That much I can give them at least.
I disagree that Nintendo are the only ones still making great games, but I might just be picky. I've got 3 games on the Wii that I enjoy: Super Paper Mario, Super Smash Bros. Brawl and Star Wars: The Clone Wars Lightsaber duels, out of all those I own, I think it was 8. I had played a bit of Super Mario Galaxies with a friend, but I didn't care for it too much. Simcity Wii (don't remember exact title), Super Mario Super Strikers, Pokemon Battle Revolution and some others that I own that I can't even remember were just let downs.
In retrospect the Xbox 360 had Condemned, Fable, Halo, Left 4 Dead, The Witcher 2, and Saint's Row.
While the Playstation 3 had things like Dynasty Warriors Gundam Reborn, Dynasty Warriors 7: Empires, Heavy Rain, Uncharted, and The Last of Us.
Both the 360 and Playstation 3 contained many third party games that I love and couldn't get on the Wii: Fallout, Fallout: New Vegas, The Elder Scrolls IV: Oblivion, The Elder Scrolls V: Skyrim, Grand Theft Auto V, and The Batman Arkham games just to name a few (I've over a hundred games on the 360, I'm not exaggerating, last inventory I believe I was at 118. The Wii cannot hold a candle to that).
As for the 3DS only four games have caught my interest and I own all of them: Pokemon X, Pokemon Y, Pokemon Omega Ruby, Pokemon Alpha Sapphire (I enjoy all of them).
I have played the new Super Smash Bros. on the Wii-U at a friends house, if I owned a Wii-U it, Hyrule Warriors and Bayonetta 2 are the only games that spring to mind as games I'd want, with the possible inclusion of the upcoming Zelda and upcoming Star Fox game.
The Xbox One has Dead Rising, Titanfall, and Forza Motorsport 5.
The Playstation 4 has Killzone: Shadow Fall.
The both of them have Shadows of Mordor, Dynasty Warriors 8: Empires and Destiny.
To be fair, current generation sucks all around so far, at least in my opinion. I know there are more exclusives out there, but I am just going by what I've played and enjoyed, and I don't like to consider games that are to be released because anything could happen. I just consider the Wii-U to be the weakest investment for those reasons, but you might find it to be the best investment because it has more games that interests you.