killeryoshis on 13 March 2016
I can see Nintendo going back. If the NX is a unified handheld + console then having carts will make it more possible. However we know so little about NX that it could probably be a toaster that plays games. As for the other two. No. Sony helped made Blu-ray and they probably get a good deal by making a console based on it. MS will probably use discs because why not?
