Nintendo isn't doomed, but as a home console player I think they are probably largely finished, which is sad.
They will still make a lot of money off mobile games and Switch will probably sell to enough 3DS owners (though will still be a decline from the 3DS) to make Nintendo a good amount of money.
But Switch isn't a system anyone is using as their primary console other than the same people who bought the Wii U (the most hardcore of Nintendo's fanbase). As a home console that thing is not going be competitive with a PS4 or XBox One/Scorpio.
Switch is no Wii, there's no new idea here to drive software sales. Nintendo needs a new IP like what Pokemon did for the Game Boy to come out of nowhere and drive hardware sales, but that is very rare in this business.







