Microsoft also wants into the corporate server room.
Microsoft has been there for a while.
IPF is its first and only path there.
That's news to me. Did you wake up this morning into some Groundhog Day routine from about 10 years ago?
In contrast Opteron doesn't take MS anywhere it hasn't already been for years on Xeon.
Windows AMD64 will definitely take Microsoft to places where 32 bit Windows could not. 64 bitness takes away a huge reason for going with RISC dinosaurs. Microsoft is not participating in the 64 bit market except the token participation with Itanium version.