I don't think so. I love my 3D-printer and I am spending lots of time modeling in 3D for it, but the big advantage of model kits I see is the material. Polystyrene is just so simple to work with, it is soft enough for cutting and sasnding while easy enough to bend into shape, and highly flexible. And it can be glued by fusing it together.
Detail-wise, the DLP printers like the photon are really great but still need some post-processing which destroys some of the detail, but that's not the real problem. The material is very hard and brittle, you can't bend it, and it is gard to cut and tends to break easily.
I think aftermarket parts can easily be replaced as soon as cheap DLP printers get about 5 times better resolution as the photon, because people working with resin parts will be willing to spend the little extra effort. But for children, beginners and the standard, occasional modeler, I don't see how plastic kits should be fully replaced with 3d-printers.