At this point i think is almost sure that PS4 is overtracked.
PS4 is at 79.7 million according to VGChartz, just 300K for the 80 million milestone. And we all know Sony always annunce every 10 million PS4 hit. They annunced 10 million, 20 million, 30 million, 40, 50, 60, and 70, there is no way they miss the 80 million annunce as well.
I could understand if they delayed the annunce for the E3, kinda what they did with 60 million... but the E3 is over. If Sony did not annunce yet the 80 million for PS4, this only mean that it has not reached that milestone.
Of course i expect PS4 to be very close to it and imo, is a matter of days, but yeah... according to VGChartz PS4 reached 80 million before the E3, and that's almost for sure is not the case.