Downwind,
The majority of your ideas have already been tested. Try googling T-NASA for the HUD-based taxi aid (the target is to allow taxi speeds to remain the same in fog as it is normally) and a lot of newer biz-jets have IFIS which can give you an "own ship" location & heading on geographically oriented electronic charts.
One aspect of the FAA's new AC90-101 Special Approach And Aircrew Requirements (SAAAR) is for coupled go-arounds so that the aircraft continues within a very narrow flight path - not sure that would square with automatic gear deployment.