The video means, that nintendo are already preparing to to show, possibly and probably ingame, Pokemon walking and running, making it likely that they are preparing to impliment everyone's favorite mechanic in an upcoming game! Also, I'm pretty sure that those sprites were found in S/M's code, suggesting that they may have wanted to, but scrapped it. so everyone hoped it would be in USUM! Or nintendo might have left them there just as a hint for the hackers who go through every new game's code.