Android/iOS reaches to a much wider audience. People who have never heard of Skyrim or The Witcher can be found bingeing on Angry Birds for hours on end.
That said, I'd like to see a greater variety on smartphones. Pokemon Go seems quite innovative, which is why it's gathering storm.
Right! That's why such games should be done in 2D/isometric 3D, which could be similar to the visual styles of the games the audience has already played.