Holographic interferometry has received many plaudits as an extremely powerful flow diagnostic method while users have languished at the cumbersome methods available and long time required to extract even the elementary data from the hologram. Recent years have seen breakthroughs that, when combined, will address the problems of producing the usable raw data quickly (the processed hologram) and transferring it into a computer in a tractable form. Keys to the former are either thermoplastic devices or on-line film processors. Keys to the latter are electronic imaging and analyzing systems that can digitize data reconstructed from holograms and then perform complex operations on the digitized data. The authors have tested, individually, all of the components required for producing fully refined, on-line density data in wind tunnels employing holographic interferometry systems, and are currently developing the fully integrated system. This paper describes the state-of-the-art system concept, components, options, and potential capabilities for realizable systems.