I guess seeing the great success of their company nintendo would consider Android and iOS as their future base for the games.
That would be heavenly for people like me.
I wouldn't go so far as to say Nintendo or Gamefreak plans on making the switch to exclusive mobile gaming; I'm pretty sure they're still going to continue to create console games. They make too much money on the systems and the games separately to believe otherwise for now.
I'm more just interested in how GO itself is going to interact with Sun & Moon. It would be interesting to be able to transfer Pokémon from one to the other, though I think it might break the gaming mechanic a bit if you could transfer from S&M to GO. I'm thinking it's going to be something more along the lines of getting Pokèmiles or the like while out and about with GO, however.