Has it been discussed that Argos in the UK has put the Switch price at £299.99?
https://twitter.com/MyNintendoNews/status/815981689012973568
I'm not one of these "Switch has to be £150!" people, but $350/£300 for the base model seem extortionate. Let's hope it's not true.
It is (for now at least) as much a place holder price as the Media Markt 999,- one. You can always decrease the price after the announcement, but you generally can't raise the price.