The 757/A300 fleet is in the process of being updated. They will get new "covers" but not the new seats. The A300's that I have seen have the headrest in coach and the new blue interior in first and coach. I have only seen one 757 with the new covers in coach, and I do not think it had the headrests. The seats in first were still the leather (tan) The carpets are also being changed into the new carpets. As for the 767-200er, I cannot comment, since we do not fly them out of MIA
and I have not seen one in years.. Hope this helps..
: No, the new 757s did not come with the new overheads or new interiors, stupid I know, but they did not..