Archaeology is a huge discipline, employing all sorts of technology in the field, on the desktop and in the laboratory. While the newest technologies are almost always beyond the reach of amateur groups, many will become available given time. At various times in the last hundred years, amateur archaeologists must have thought that aerial photography, geophysics, GPS and LIDAR were miles beyond their reach but all are now available to a greater or lesser degree.
And so it is with photogrammetry: the application of computing power to a collection of photographs to build an interactive model of an object or excavation. The advent of phones with high resolution cameras and powerful consumer level computers has made this pipe dream a reality.
To illustrate its usefulness, here's a link to one of our photogrammetry models of a test pit. While it doesn't give the level of detail required for archaeological recording there's no doubt that it provides a fantastic overview. Importing such models into virtual reality systems will probably become commonplace, giving the viewer a real sense of 'being there'.