Technology has broken the final frontier, everywhere in our modern lives we are exposed to modern technology. There seems to be no escape from it even if you wanted to. Its bad enough that it hounds you at work, at home, even your play/relax time is most likely festooned with some type of techy gadget. The new fangled stuff cooks our food, operates our cars, controls every aspect of your day to day life, now it will even follow you to the grave.
When you go to visit the dear departed in the future you will just hold your cell phone next to the marker and you will be able to see and hear your loved one from beyond the grave.