Seems like a lot of fearmongering to me. For the foreseeable future most good devs will target Xbox One and PS4 spec as that is their target audience. The ones that jump the gun and gimp the base PS4 version, just avoid their games.
For the first year yes but after that there is no way that happens. Developers will always target the platform that better shows their game. That's why we get PC demos claiming they are PS4/XB1 demos or demos that aren't actually playable.
Do you really think they will not start focusing on the platform that better enables to show off their game to the public? Also it will be easier to develop, so anyone in the right mind will focus on that. No dev is a masochist.
PS4 and XB1 versions can always be outsourced to Iron Galaxy Studios.