In Mark Goodacre's The Synoptic Problem: A Way Through the Maze he mentions the possibility of a "three dimentional synopsis."
Logos is so gung-ho on interlinears that I decided to propose another interlinear which would thereby put the format to some useful purpose. In this interlinear one could view the critical text or by toggling on variants one could view various differences in manuscripts with an indication of which manuscripts have these readings.