Today in a Nintendo Direct, Nintendo announced Pokémon X&Y for the Nintendo 3DS. It has fully rendered 3D graphics, unlike the previous installments in the series. Some new Pokémon will be making appearances, as one would expect. The 4-directional movement seems to be making a return and the series is making a departure from the fixed camera system of old.
Arriving worldwide October 2013
You can watch the full presentation here: http://www.nintendo.co.uk/Misc-/Nintendo-Direct/2013/Pokemon-Direct-08-01-2013/Nintendo-Direct-699626.html
If that doesn't tickle your fancy, perhaps the YouTube version does: https://www.youtube.com/watch?v=4bIrWryFc7A (Thanks Ninny!)
Some screen captures from the Nintendo Direct are below.