I just bought the 2007 Erykah Badu "Amerykah Vol. 1," and heard a couple of slap/pop licks thrown in. No prominent grooves completely slapping, but those particular riffs did grab my attention, so I thought I would post the relevance here (I'll have to look up who the bass player is, haven't read the liner notes yet).
Anyway, yeah, I agree that's it's sort of passe for right now, but you never know when it could be used to great effect.
For example, anyone see the Youtube clip about Steely Dan cutting "Peg?" They specifically didn't want Chuck Rainey to slap on the tune, so he just turned around so that they wouldn't see him slapping through the studio glass on every chorus. For me, that's one of the elements that makes the tune, and even Donald Fagen and Walter Becker had to admit that it helped better the song. Given that is an old song now, but it's the same "no slap" attitude that was eventually turned around.
So, maybe if we are sneaky, we can bring slap back into the mainstream!