One of the two main points of the Out of Africa hypothesis has always has been that there was absolutely no interbreeding ever between modern humans and other hominids, whether in Africa or elsewhere, and that modern man was supposedly a wholly separate species. So, since this has been debunked, it makes the Out of Africa theory even less likely than before. There's now some scientists claiming that the various hominids all over the world got gradually hominised gradually via evolution/gene-transfer between populations etc., with Neanderthals eventually evolving more modern  traits etc., rather than a mass influx of modern humans from Africa in very recent times.

Oh, and there was also mention of intermixture between modern man and archaic hominids in Africa, not just Neanderthals and Denisovans. Given the sheer lack of fossils found so far, it wouldn't surprise me if advancing technology eventually shows that modern humans have a far bigger percentage of archaic hominid DNA  than currently discovered.

Geoff