When I don't have to read over 100 pages of NOTAMS from a system that dates back to 1947, then I will start believing that aeroplanes might be able to operate themselves.
Furthermore, having technology available is meaningless without a way to roll it out in a manner that makes economic sense. I think the cost of integration will outweigh the benefits and it is going to take decades to get buy in from the required stakeholders simply based on the ROI.