Not sure why anyone is making PS3 comeback references with regards to the XBO.
It's not going to happen people.
It would require SCE to do everything wrong with the PS4 whereas all they really have to do at this point is hold course and continue to add games to the PS4 catalog.
3rd party support is already in favor of the platform, so this is practically being handled without SCE doing anything with regards to their own studios' games, which incidentally, are still being produced.
About the only advantage the XBO has are their IPs (Gears, Halo, Forza) and a good portion of their former NA XB360 audience. The numbers already demonstrate the XBO has lost a significant (approx. 30% last I heard) portion of that audience to the PS4. This is not something they can build off of and I believe the '15 holiday totals will demonstrate that there are not tens of millions of NA XB360 owners just waiting to make a switch to the XBO.
At this point, the focus should have already shifted to the exclusive games each platform provides with the acknowledgment that they are not a determining factor in any hypothetical paradigm shift with regards to market share.