While I know there is a cool factor to having something 'stealth,' there is also a safety factor from having some visibility. Especially at night, I want to 'be seen.'
During the daytime, your average bike is visible to the alert driver. Factor in dark colors, the ever-popular black bike, and the rider's choosing an apparel/wardrobe which is also black, and on a hazy day, or around sunrise or sunset, your conspicuity can literally vanish.
For the reason that to be seen is to be recognized, and to be avoided, I will keep my 'ugly' stock rear lighting appliance. I also wear a nearly-all white helmet, and if you see two riders riding side by side maybe 1000 ft in front of you, one wearing a white helmet and the other in a black helmet, the black helmet rider almost vanishes. The white helmeted rider remains much more recognizable as being a motorcycle rider, even at that distance.
Style over visibility? I want to be seen, and to be recognized. Those 'eyebrow' lights do look cool though.