Sony can only say this for so long. Once Microsoft"s studios really get their games out, after being acquired, are we really sure Sony releases will be better quality than Microsoft releases? After all, Microsoft games outscored Sony titles last year. And the studios Microsoft have acquired have gone on hiring sprees post acquisition. MS is putting massive resources into the gaming division and there is no reason games from a subscription service can't be as good or better than non-subscription titles.
Sony's stance on this issue will be outdated in the years to come. Just like the music, tv, ,movies and print industries won't go back to a pre stream world, neither will the video games industry. Sony needs to figure out their streaming and cloud strategy soon or they face the danger of no longer being the leader. They are fighting against irreversible trends that they eventually will have to also follow.