Do you know of any new system offered with power and signal over the same coaxial?

I am asking because 2 weeks ago I run by accident into a new product demonstration by 2 Korean guys using a 4 channel recorder don't know if DVR or NVR or whatever the device is (looks like DVR).

It works exactly like HD-SDI but when looking at the camera I did not see any power feed, when asked, one of the guys say the power was on the same coaxial cable up to 100m, more than that a booster is needed, he show me the booster.

The camera was a 2 megapixels digital camera.

I did not ask more because I was not invited and don't want to be intrusive, I though the guys were Chinese and salute them in Chinese, they don't like it, latter was informed they were Koreans.

Latter I try to find out from which factory they were from but the distributor did not give me any information just telling me is a new product not yet in the market.

All I saw as reference is the DVR has the name WESGATE (not WESTGATE), when searching for that brand the only thing found is a division of Daewoo.

I ask because working in a project to renew 10 locations security systems and the best I found (up to 2MP) is that one I saw there.