Why do people keep claiming MGS4 is PS3's saviour?

[Gearbox]

y do people think the ps3 needs a saviour? look at the chartz since release. Choose ps3, Ps2 and xbox

Which console is doing the best? COUGH here is a hint NOT 360! COUGH

the ps3 is dipping under the ps2 a bit now but thats because every1 will hold off on getting a ps3 until MGS 4!

Saviour? wasn't necessary