I think, regardless of where Zelda U and Star Fox land on the quality scale, Wii U is easily better than Wii at this moment and yes tied with N64 but close to knocking it off. N64 has a couple advantages, one slightly stronger 3rd party support gave it some favorites of mine like Shadows of the Empire, Mortal Kombat Trilogy (although I had it on PS1 also), MK4, and it had a pair of really neat Bomberman games and a Tetris, all things Wii U is currently lacking. If they could get MKT and MK4 VC N64 and an original Bomberman that makes use of the tablet and a decent Tetris it would surpass N64 easily. Without those things no matter how good Zelda U is it will be tough to beat Ocarina of Time, original Mario Party (man I had so much fun with that game I am still confused/pissed it's not on VC when the crappier 2 is) and and Super Mario 64. It could also use a good Rogue Squadron type game, or any Star Wars games for that matter, but it is what it is.
As far as controllers go, I rank the tablet higher than anything on Wii even the Pro, higher than N64, higher than NES, tied with SNES (only because the tablet's buttons are too spread out it hurts my hands playing, opposite problem as NES being too small) but beneath Game Cube (including GBA connectivity and Wave Bird)
As far as extra features, I rank Wii the best, despite the lacking game library and the sloppy last-gen with waggle tacked on ports, the Wii had the most fun non-gaming apps when it was at it's height, sure Mii stuff got old after a while but damn those early days of Mii share or whatever it was called, that polling app, the Opera browser, the Mii TV or whatever it was called, the Nintendo channel, all those early channels/apps were actually worth owning a Wii for. They weren't good replacements for games and when the library started to feel thin they started to lose their charm but for a good year at least the channels/apps was where it was at, I will give the Wii that much.
Wii U didn't even try with apps, it was almost like they put everything into Miiverse and figured to hell with it good enough, even the Netflix app was better on Wii for the first few years into Wii U's life. In fact the only thing I don't like about Wii U b/c is that the Wii Apps either don't exist or don't work in it or anymore at all.
As far as design, Wii U is ugly, but not as ugly as N64. NES was different for the time, SNES looked like a toy, Game Cube was cool looking but it had a bad, but undeserved, reputation of being a lunchbox, and Wii looks only slightly better than Wii U only because it looks right, Wii U looks stretched and warped for what it is. Like they just let the Wii eat too many bacon wrapped bacon sandwiches dipped in bacon grease for a couple of months and then threw it out to market.
But as far as original games go, Wii U sucks, it has what, one game that can be considered original? It is great but that is it, one original game. Everything else is just a new spin on an old idea, Dr. Luigi, sure fun but it's just a new skin to Dr. Mario, NES Remix, sure fun but it's just the same old NES games I already own on dozens of platforms, Super Mario Maker, sure it's fun but its not new, or original.
The best thing I can say for Mario is the catsuit was so fun it better make a return, and Super Mario 3D World is still my favorite 3D Mario, and I recently went back and tried all previous entries except Sunshine because I don't have a Game Cube, and it still has me having more fun than I do with those. But Super Mario 64 is still very close in the fun factor even as ugly and outdated as it is, which is why that is the one HD remaster I want the most. Yes I do want original games too but the old games aren't going anywhere and revamping them, giving them a facelift, tweaking them, etc, how hard can those things be?