I think 3DS will cross 100m but not come close to DS. WiiU I think will end up around 60m or so (original NES numbers)

As far as the question goes for those numbers, 3DS would be good since they're profiting as far as I know even on the hardware. WiiU would be pretty disappointing. That's pretty much N64 numbers and it's hard to regain relevance after such a generation on home consoles (Wii caught lightning in a bottle but will it be the exception or a new trend?).

Yes, meaning the market will have shrunk and the 3DS didn't expand the market the way the DS did.

Well, that 3DS figure is ~ 2/3 of what DS sold, while the Wii-U figure is ~ 1/3 of what Wii sold.

So based on that alone, 3DS would be more of a success/less of a disappointment than Wii-U.

Profits will play a big part in determining success or failure too, but as Wii-U is already been sold at less of a profit/probably a minor loss compared to 3DS at launch, I don't think we'll have to worry about that too much.

No, its not a disappointing at all.
Also, Nintendo will most likely end up as the most profitable as well.

WiiU numbers are satisfactory for Nintendo.

3DS not so much. GBA was killed off early to rest at that 90million. Mobile is indeed a big factor now, and handhelds should stay relevant for a time, but something needs to change overseas for that. Japan likely will stick to handhelds for sometime to come, but Nintendo either needs a 3rd pillar or a radical new idea.

Failure? No. More like a large setback. That said, I do believe that the 3DS will sell a lot less than the DS lifetime.

It depends how many games sell

Well generally speaking I'd assume fewer hardware units sold = fewer software units sold, though it isn't always that cut and dry.

The 3DS might be considered a failure, but only if it has a long life. If it is discontinued in 2016 or something, then those are great numbers.

For the Wii U, that would be a big flop. The Wii U needs to sell at least 50 million units of hardware lifetime to keep Nintendo relevant in the console sphere.

Getting to over 50 million hardware units really isn't as easy as people think it is.

There's only really a handful of consoles that have done it -- NES, SNES (close enough), Playstation, PS2, Wii, PS3, and XBox 360.

All of them except for the Wii had exceptional third party support, and the Wii bucked the trend by having the casual/blue ocean craze all to itself for 3-4 years.

I don't think Wii U really has either the same support from the casual market this time around, nor does it have the third party support. You can't strike out in both these areas and expect for 4-5 franchises (Mario, Mario Kart, Smash, Zelda, DKC) to drag the entire platform to 50+ million. Just doesn't work.