*cough cough* You mean x86, not 32-bits.
Plenty of other arches still use 32-bits for some things (this includes x86_64.)
PS3 isn't even x86 mind you, it's PowerPC.
Also, IA-### processors can't run lower-level OSes (IE: IA-64 can't run x86 oses.) This is why x86_64 processors were created.
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