So I'm around a week late to finding this video, but it shows some pretty nifty things.
Biggest things shown (if you don't want to watch):
-Catching a pokemon
-Fishing
-Froakie, Fletchling, Honedge, Octillery, and Inkay in battle
-Surfing
-finding an item
And it wasn't until today that I noticed 8 directional walking .-.
(either way, yes! pokemon has needed 8d since AT LEAST gen IV, but the switch to 3d was probably needed to facilitate that addition)