It is not possible with the current PS4 model, which means they would have to create a new model. And as I already have a PS4 I would not be lining up for the B/C PS4, which would probably come with at least a $100 premium over the base model.
In the end I think full B/C with PS3 would be a waste of time and effort even if conceptually it would be a cool thing to do. What I would rather have Sony announce is that they are making a multi-generational commitment to sticking with this current architecture, which means that B/C will be baked in for the future. Like PC the essence of future generations is just superior hardware but same basic deign and operating system.
“The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.” - Bertrand Russell
"When the power of love overcomes the love of power, the world will know peace."
Jimi Hendrix
