So? That line of reasoning doesn't make sense to me. If you would be just as happy with PS4 or X1 then you would've bought one already. People buying a Switch are doing so either for Nintendo exclusive games or for the hybrid gimmick. Obviously the price can't be too high but it's not simply a direct comparison to PS4/X1 price because in reality there aren't a lot of people just waiting around deciding which singular platform to adopt.
That's true among core/serious/whatever you want to call them gamers.
There's always less serious gamers that straggle along when it comes to adopting newer generation consoles. Kids that age and ask their parents for a console etc.
Then you have gamers that already have a PS4 or X1 and are on the fence between buying the one they don't have or the new Nintendo. If the Switch is more expensive that could sway a lot of people to PS4/X1 instead of Nintendo.
Or people like me who have a PS4 and PC (where I play the MS stuff) and/or X1 and have to decide if we really need yet another platform for some exclusive games. Higher prices pushes more of those fence sitters to the pass side than the buy side.
So I agree that it's not a HUGE deal. Nintendo's success will mostly like with retaining the Wii U+3DS base. That's like 50-60 million and plenty to make huge profits on with their high attach rates that will only increase with having all their games on one platform. But a lower price will speed adoption and help sales to the secondary console crowed and family market.
For $250 I'm 100% in. Probably at launch, if not a few months later if I decide to wait and finish Mass Effect etc. first. $300 and I'll probably hold off a while. More than that and it's way off my radar for a while. It's not the money as I can afford the differences easily. More the principal of how much I'm willing to pay for a third platform after PC and PS4 given how many games I struggle to keep up with there.