It took some time to figure out, but if I am not wrong, do the scan effects linger longer with holograms?
Anyway, considering every object is static, there really isn't that much of a challenge after you've figured out how to differentiate between holograms and "normal" objects, but the scanning mechanic is really interesting, and even though the ui and models are generally very simplistic it also gives you the feeling that you're a mech ransacking a city.