1) not being a general purpose OS. Sony actually took at away that ability in the PS3 so they aren't trying to pretend they do more than play media
2) the hardware and software is ephemeral. In 10 years IOS and Android will exist. We will likely be on the PS6 and 2 more generations of Nintendo in that time. There's less incentive to bother opening up an OS that is abandoned every generation.
3) due to the model of consoles, most of them lose money on sales so they can invoke more software sales. And on top of that, larger studios get direct support from Nintendo/Sony. There is negative incentive for a studio to ruin this relationship unless more companies start making consoles themselves.
1) not being a general purpose OS. Sony actually took at away that ability in the PS3 so they aren't trying to pretend they do more than play media
2) the hardware and software is ephemeral. In 10 years IOS and Android will exist. We will likely be on the PS6 and 2 more generations of Nintendo in that time. There's less incentive to bother opening up an OS that is abandoned every generation.
3) due to the model of consoles, most of them lose money on sales so they can invoke more software sales. And on top of that, larger studios get direct support from Nintendo/Sony. There is negative incentive for a studio to ruin this relationship unless more companies start making consoles themselves.