I think Nintendo wouldn't choose to use haptic feedback if they hadn't tested it extensively and concluded it was viable for gaming. And I think Nintendo, as the designers of a dedicated gaming device, are much more likely than apple to consider and take into account the effects a haptic feedback device they're working on would have on playing games.
Saying it's not viable as it exists on Apple devices right now is irrelevant, since it's possible Nintendo has created a better version. Hence my answer is wait and see what impressions are like and whether or not it is viable. And even if it isn't preferable on a personal level, if that's what we get and it works well enough to be viable, if inferior, it certainly won't stop me from purchasing the system.
Sorry to be so cynical, but you seem to have the belief that Nintendo "gets it." That they wouldn't create a device with major drawbacks and fundamental flaws. That Nintendo wouldn't replace something that has been viable for something risky.
I don't. I don't think Nintendo understands the home console market. I don't think Nintendo has a good grasp of hardware technology. I don't think Nintendo understands their target audience or how to grow their existing audience.
Now, I want to be clear that I think Nintendo is vital to the game industry and I used to love them. That's why, to be blunt, I'm fairly harsh when it comes to them. Because Nintendo has a very loyal fanbase that they seem to cater to and focus on despite the fact that their fanbase, as passionate as they are, aren't enough to sustain the company.
So I don't think having blind faith in Nintendo is smart. Instead of assuming Nintendo tested it and it's great, think for yourself about using digital buttons and physical buttons.