The N-GAGE has existed in multiple iterations and failed every time. And that's not the only device I mentioned. Thanks for cherrypicking your argument.
I do agree that convergence is the right way to go, but Nintendo has shown - through their success - that it's got to be done slowly. Converging too quickly is a recipe for failure, because it typically means that things become complicated too quickly, consumers become confused, and devices turn out more expensive than people like. Those are the reasons the N-GAGE failed, why the PSP has lost its momentum so quickly, and why the PS3 failed to take off. They all tried different methods of convergence in ways that didn't work for the general public.
The point is that convergence has to be done right, or it will prove to be a tremendous failure. Nintendo is aware of that, so they're being cautious. Perhaps they're being too cautious, but you can't blame them. Not being cautious enough has proven to cause failure after failure.
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