Why will MGS4 & FFXIII save PS3 when MK:DD & M:Sunshine didn't save GC?

[Crono]

mitsuhide said:

libellule said:
And honestly, if the PS3 doesn't pick up sales this holiday season, don't expect FF13 to stay on the PS3.

==> I agree.
Same for MGS : bad sales for the PS3 version will accelerate the release of the Xbox360 version.

You dont even know if there is going to be a 360 version and if sales dont pick up for the PS3 during Christmas i would be surprised seeing as its the PS3 FIRST Christmas in Europe.

FFXIII has to stay on PS3 otherwise making the White Engine would have been pointless as it can ONLY work on the PS3 because it uses 4 of the 7 SPE's available to developers.They would have to make a whole new engine to run it on the 360 and that costs MORE AND MORE money. 

If the white engine uses 4 of the 7 SPE's and the main CPU, then that is 6 total threads that can be occuring simultaneously.  Guess how many the 360 can do?

Yeah, they could port the white engine to 360 if they wanted.  But I don't think they will.  I think they'll port FF13 to UE3, since Square recently licensed it.