1.) It remains to be visible on thermal scanners, infrared, radar.
2.) Moving in dust and mud makes the hull being visible by the dirt on it.
3.) Sounds like a very sensible, easily malfunctioning technology.
4.) Camera projections remain to depend on the viewer's position, and so slight changes in angles will produce visual artifacts.
In the SB forum, a guy, an ex-tanker, just commented with this: "It's useless."
http://www.steelbeasts.com/sbforums/...ad.php?t=11012
Active camouflage:
http://en.wikipedia.org/wiki/Active_camouflage (thanks for the heads-up, JAS39!

)
It probably makes more sense for aircraft, than for ground combat vehicles.