Seriously, sorry, but I don't get why some of you are upset yet surprised that these games are going to be in 3DS. BW2 were basically the last proper DS titles ever. They could have gone to 3DS already in 5th generation, so this is only natural and 110% expected.
You know that you have to buy new console at some point, and I'm sure this will boost the sales of 3DS.
Please consider the fact, that around the time these games are released, Nintendo DS is already a Nine-year-old console.
This is exactly the right direction. Pokémon evolves, you need to evolve with it by buying a new console. Logical.
I would be more than shocked if these titles weren't for 3DS.
I just got my Pikachu 3DS XL on Xmas so I'm safe with this~