If it were a step up in graphics (like the Wii U was over 360 and PS3), then a "lead" would be something I would worry about. As it's not even trying to compete with Sony and M$ in terms of horsepower, I don't think the launch of the PS5/XB2 are all that worrisome for Nintendo.
I also imagine Nintendo will be doing upgraded models for the Switch (i.e. New 3DS) with a longer battery life, some extra RAM, maybe supplemental processing from the dock, and more effective cooling tech so that the system can run higher than 30% portable, 70% docked.
Still... for the sake of argument: Nintendo is going to want this thing at 30M by 2019, 40M by 2020. They are fighting for relevance right now.
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."
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