I really like GoPro, bought one a few months ago. But longterm I really wonder: it seems this will be disrupted from the low end, right? Currently GoPro's have better quality, but in a few years a $50 Chinese clone will also do 4k video at 120 fps. Where can GoPro add value when that happens? There isn't much lock in (a bit in the various plastic mounts). Any thoughts where they will go?
The term GoPro is used to describe any action-orientated camera in popular consumer circles. Aficionados will always use the correct terminology but my family and friends just refer to portable, waterproof, sports cameras as Go Pro's.
Even you tell them it is a Sony or X brand of helmet cam they will say "So it is like a Go Pro?"
They have become synonymous with the market like Hoover and BiC.
They also provide software services for editing footage and galleries for for you to upload your work. In time I can imagine they will expand to make the editing process as easy as possible.
Reliability and durability go an awfully long way. There are already a myriad of clones which do more for less - but they're not GoPros so most people can't be bothered with the "good luck have fun" approach to if they'll work or not.