To give my final take before leaving this thread, I don't think this comment about Capcom changes anything to the situation we were all already assuming.
Monster Hunter is known in the west as a franchise managed by Nintendo. It releases on 3DS (with one episode on Wii U), Nintendo did everything they could to advertise the games, and with every new entry, the west sales grew up a little. With MH4U they managed to sell one million copy on the west, and I suppose MHX did the same, or is about to do the same.
Now that pure handleds are dead (since Sony gave up and Nintendo decided to market the Switch as a home console), they're giving investors the reason why 3DS won't get the next MH game (besides Double Cross I suppose) : it would be harmful to the franchise to continue on 3DS in 2017 and beyond.
That doesn't mean they're gonna bet everything on the PS4. That would be, IMO, stupid, just like it was stupid with Street Fighter V. They managed to make the Nintendo audience like Monster Hunter, with these several releases on 3DS. Now, their next objective is to continue the expansion they made on 3DS on the next Nintendo console.
To put in a nutshell : MH5 (or whatever the next MH in the west is) will come on Nintendo Switch, that's the most probable outcome. A potential PS4 version is not impossible but not likely either. They would need to redev everything for an audience that might just have bought the game on Switch if it only released there.