The "see through x-ray" thing as you call it (its actually a passive millimetre wave camera produced by Qinetiq) is very cool and you can expect to see that appearing in airports everywhere reasonably soon (unless lots of people complain about the fact that they get to be seen naked by the opperators). In a few years a similar technology to this, but using THz frequencies should hopefully be produced which will enable them to run a kind of chemical analysis scan of a person through their clothing, totally non evasively to detect the prescence of any contraband molecules such as illegal drugs and / or explosives. Works by the nature of molecules rotational and vibrational bonds being in the THz range. Of course they have to first build quantum cascade laser capable of operating at a decent power output in that frequency range, but that should be only a couple of years away, and there are a few other potential hurdles to avoid (such as the THz wavelengths being very close to the seperation of most fabrics producing annoying defraction effects). When thats working (assuming its not canceled due to potential health reasons) its really going to be an exponential leap forward in detecting ANY kind of contraband going onto an aircraft.