I could swear this topic was posted here before, and I posted in it, but perhaps it was elsewhere.
We actually have a client using this technology to power cameras. I have yet to see the equipment in person, but the general layout is like that shown on the VoltServer web site. Having not examined it, I can't say if there is just some trick that makes it look like it's doing something new and innovative, or if it really does - all I know is that it does get the power out at the far end. Does it take 10x power at the input to make it work? I have no idea. It's not a client I work with frequently, but I do have an upcoming project that will likely require some on-site work, so I will try to get a look at the equipment and see what's going on.