I think that saying "Sony focuses" is incorrect
Sony's strategy was to have a platform almost as open as PC (obviously could never be quite as open) to attract as many developers and games as possible. As a result, indie developers turned to Sony. So it's the indies that focused on Sony/PS4, not the other way around.
Back when stuff like Rime and Everybody's Gone to the Rapture was announced as PS4 exclusives the developers talked about THEIR decision to partner with Sony and why they thought it was a good idea. They went to Sony, Sony didn't go to them.







