But it will be 10% more usable performance than is available now, yes? So again, how can this possibly be a bad thing? Are we operating under the assumption that the PS4 locks away 0% of its horsepower for UI and services? If so, I would like a link that verifies this please.
There's no indication yet that PS4 locks part of its GPU power away. RAM and CPU portions being locked away is expected by both because of the OS, it's just a question of how much. But now we see that MS is locking the GPU away too and it will be given to devs eventually. That means people working on it now don't have it, that's why this is bad news. It means right now the XB1 is even weaker than it's supposed to be compared to PS4.