But the BEST product Apple has had, OS X, nobody even bothers to say 'Yeah, I really like OS X over Windows' but rather you hear people saying 'I want <insert iOS product here> or a MacBook' without acknowleding the fact that OS X is the reason why Apple's *real* computers have been so good.
I think people take OS X for granted. It's the dependable friend that may not be the life of the party, but drives you home when you had too much party. That, and Windows has caught up a bit. But I think when people say, "I want a MacBook", OS X is an unspoken part of the deal.
Let's be fair though -- OS X is basically a reskin of NeXT's NeXTSTEP OS. (In fact, most of the internal developer APIs still use classnames that start with "NS") Apple made it more consumer-focused, but I would say it's only as much of an "Apple product" as Siri is -- they are both technologies gained through company acquisitions. That NeXT was Steve's company does help a bit, but I've always wondered how much Steve was really involved in the design of NeXTSTEP considering he wasn't really a techie.