I don't think "less than $300" is a $299 price announcement. I mean, the question was "less than $700?" This is just a way of safely narrowing it down without talking about what Nintendo doesn't want to talk about yet.
BTW, as for the N64 price, the PlayStation launched in Japan at 40,000 yen ($400). When it launched in America (Sept 95), it dropped to $300 (30,000 yen). Two months later, Nintendo unveiled the N64 at Shoshinkai and said it would be 25,000 yen/$250. Six months later at E3, Sony undercut everybody by dropping a full $100 down to $200, sending Sega panicking into a similar pricecut, and making Nintendo laugh arrogantly, saying everyone else needed to be $50 cheaper in order to compete with the N64.
The N64 launched in Japan one month later (June) at 25,000 yen, but it fizzled after it's weak two-game launch (despite one of those games being Mario64), prompting NOA to push for a price drop down to $200, which was approved mere days before the American N64 launch.