Yes but they are not generally seen as mere transportation. If you use it as that you kinda look like you are a overgrown teenager. If you use it as a platform for tricks and jumps it is again fairly dangerous. This time not in lives lost but in bones broken.
When I see Tony Hawks Segway Pro in the shelves because people want to do those tricks but are afraid to break their bones, then maybe then Segways will be cool. All I see on the horizon is "Ride your Segway like Woz" the iPhone App that really only plays 3 videos (But you know how hard it is to get a video into iTunes).
You use a reasonable amount of energy skateboarding. I would guess 300-500 cal/hr depending on what you are doing. You'll notice there are no fat skateboarders. The Segway didn't take off for a combination of factors. It looks lame, there's no place you can ride it legally, it costs the same as a motorcycle but you can't finance it, etc.
When I see Tony Hawks Segway Pro in the shelves because people want to do those tricks but are afraid to break their bones, then maybe then Segways will be cool. All I see on the horizon is "Ride your Segway like Woz" the iPhone App that really only plays 3 videos (But you know how hard it is to get a video into iTunes).