The LED forum (overwhelmingly representing handheld lights) is 8x as active as the headlamp forum. Most manufacturers put their main efforts into making hand-held lights, only a few dabble in headlamps, if at all.
Why? I don't understand why *not* losing one of your two hands to hold a light, isn't a more popular solution than it is.
Im not saying it has to be a headlamp...any option that frees up my hands is appreciated, including bent head lights that hang from the chest or belt. But it seems the majority of the world is perfectly willing to give up 50% of their dexterity to grip a flashlight.
Don't get me wrong, I understand how useful a handheld is when walking down a trail looking for bears...and other situations where you need to point the beam precisely...but for the vast majority of flashlight use, isn't NOT having to hold it, preferable?
[From recollection of answers posted to original question: Handhelds allow more precise placement of beam, are easier to pocket, can act as defensive weapons, can be much larger thus run longer and throw farther, are easier to modify, are more fun to fondle...and the one that sucked all the oxygen out of the room: headlamps make you look mockably geeky and goofy, whereas a handheld makes you look sexy and cool.]