Now all we need is to make the technology down-scale in both size/weight and cost. It would be great to see these systems adapted and installed in smaller, lighter aircraft. There are still far too many CFIT fatalities in the private and small aircraft world. They have synthetic terrain warning (superimposing the aircraft's position from GPS and altimeter over a topographic data to determine horizontal and vertical proximity to terrain) but no active warning systems. GPS is good, so is the altimeter, but neither are perfect all the time - if they were, ground proximity warning systems (GPWS...aka "WHOOP WHOOP, PULL UP!!") still are prohibitive for small aircraft operators.
Kudos to the GPWS team though - they saved my ass on at least one occasion in a previous life when I was professional pilot!