Watson is actually way "smarter" than any human in certain ways.
That has *always* been true of computers. That is, in fact, exactly why we built computers in the first place: to do things faster than humans can. Saying that something is "smarter than any human in certain ways" is meaningless. Hell, in a way, rocks are smarter than humans. After all, if I throw a rock, it "knows" exactly what path it should take (minimizing energy, interacting with the air, etc.) Sure, it'll be nearly a parabola, but it will be perturbed from a parabola by tiny air currents, minute fluctuations in the gravitational field, et alia. And it will follow the resulting path perfectly. Humans cannot calculate, and will never be able to calculate, this trajectory with perfect precision. No one would ever say the rock is smarter than a human, however, because obviously, it isn't. It has absolutely no intelligence whatsoever.
Watson is, fundamentally, no different from that rock. Sure, it follows a very complex "path" indeed (though laid down by humans), but the only difference between the rock and Watson is the *kind* of path. In fact, Watson's path is less complex than the path of the rock (which isn't entirely a fair comparison, since the rock's path is practically infinitely complex). There is intelligence in Watson, sure, but it's our intelligence, in the same way a thrown rock can make a deadly weapon if well-aimed. This is not to say that it's impossible for humans to design an intelligence that can supersede our own, but the kind of intelligence required for the "singularity" is entirely and almost completely different from anything we've come up with so far. We might do it one day, but it'll require an invention of an entirely new kind of artificial intelligence, and we don't even know what that kind of intelligence would look like, beyond possibly running a simulation of a human mind (which is, quite possibly, one way of doing it).
I certainly wouldn't listen to the "it's coming in 2040" predictions for the singularity: I mean, people seriously thought we'd have fusion power, flying cars, and regular moon trips by now 50 years ago, and none of that happened. On the other hand, we did get the Internet and ubiquitous wireless communication, which few people predicted. The future of technology that far away is unpredictable, because it relies on new discoveries, and by definition we don't know what we haven't discovered yet.