Serebii listed this in their news update list from today's Direct. Edit @ 15:40: It is currently noted that The Pokémon Company International's press site is listing Ultra Sun & Ultra Moon as being on the Nintendo Switch with a "To Be Announced" date. It's currently unclear if this means they will come out on Nintendo Switch in the end but we'll provide all details as and when they come. They have since deleted this note. What do you think, will a Switch release be in the near future?
Well, they seemed very keen to drive home the whole "play on the go with friends on switch! Look what the switch can do LOOK!" point in the first part of the video, so it seems unlikely to me that it would be switch only, ... not to rule out maybe some kind of split release between it and 3DS since thats what happened with mystery dungeon, but... it seems to me that if it was going to be on switch they'd want us to know, that's the whole point of the announcement, to brag I guess? It's not like that's the kind of last minute wow detail you save for people on release, or else they may not have the right console to even play it. It really doesn't seem like it would be switch only, but I guess that'd be a good way to force stubborn people like myself into getting one
I doubt it would be on the switch since they would have to reformat the game to play on TV since the DS is all handheld and in 3D while the switch is handheld and a home consol
There has been an announcement and USM games are going to be 3DS Exclusive. No Main Game for the Switch this year.
Personally, I don't have hopes on that console and spending money on it would be a decision that i won't like.