And I'm sure just cause CAA/NATS approve something everyone will rush out and upgrade right away right? I doubt it.
TCAS in all GA Flying School planes? I doubt it.
Yes all these technological advantages are amazing, and yes, if I was buying a brand new plane in 5 years I would hope it had all this, and yes I hope all the usage increases, however retrofitting a 30 year old PA28 one doesn't need to be 5-10 years ahead of the approval of new technologies...
Things don't tend to move very fast in aviation legislation...
Remember, all you need is a time piece and a map and a magnetic compass to legally fly
(I know some idiot who has also ditched all this and "claims" his iPhone has a time/compass/Skydemon and so is legal carrying just his iPhone ... I disagree but hey, its his life!)