Nintendo does not stop. The company has stated this on numerous occasions that it continues developing hardware.
Meaning? Meaning right now Nintendo is working on new hardware. Right now!
"We are of course studying and developing the next console to Wii," Nintendo president Satoru Iwata said at a recent investors meeting. "However, there is a big difference between studying a product and announcing what it is and when we will release it."
That's correct! Just because Nintendo is working on something, that doesn't mean it will release it.
"At the same time, it is really important for our business to positively surprise people," Iwata continued. "Will you be surprised by our completed product if we told you how it is surprising three years in advance?"
Yes, yes I will. And that doesn't mean I like surprises! I hate them.
"Therefore, we basically disclose information on our products as late as possible. We believe this is the best approach for the entertainment products we are developing. Again, we are planning the next products for Nintendo's continuous growth, but we cannot tell you what, when and how we will release it here."
To recap: Nintendo is working on something. It is always working on something. Nintendo likes surprises. I don't.