My Take:
I'm not here to say if it's fake or not, cause either way I don't really care. A computer's a computer. It's what's inside that counts.
I do have two questions though.
1) For major computer announcements, isn't there typically a month or so gap between the announcement and actual shipping of the product? If this is the new iMac it's kinda early to have such a finalized-looking box, isn't it?
2) Shouldn't be Apple be much more secretive about this sort of thing? Locks, bolts, armed guards, cyanide coating, etc? I thought Apple would be much more cafeful about this sort of thing, rather than, "Hey, Joe Blow, go bring this up to the show floor!"