Yes you're right , im always waiting xD
I'd get it now; the next upgrade that I would spring for would be "maybe" Ivy Bridge, BUT ONLY if they added something else; a simple processor upgrade, IMO, wouldn't be worth the wait seeing as you get a SMB processor in the current machine.
If they upped the graphics card or removed the optical drive and increased battery, maybe, just maybe, would I think of selling my 2011 MBP and getting a new one.