It looks an interesting combo for those invested in the GoPro ecosystem but for people who have a variety of other types of cameras and devices it's not really any more affordable. I also disagree with the sentiment that the Hero 4/5 cameras are intrinsically better than a Phantom 3/4 camera, particularly if you're looking for high quality, non-distorted footage. The "GoPro Style" of video has its place but it will really be about what your intended use is. I will be curious to see how well their stability algorithms and the Hero5 camera image quality works out, so far the footage looks decent but the test is how well 'average' users can work them.
The RC has a number of pro's and con's, for me connectivity is going to be a big question if you use the Karma around moderate to high interference, but it will definitely be a nice compact package. For backcountry skiing, biking, etc. it could be a lot of fun, especially with the handheld stabilizer grip. I think the pre-release clips got people thinking along the wrong lines and may cause some backlash outside of the GoPro enthusiast community. I think the library footage may have been taken using the handheld stabilizer, if it wasn't then it was fairly misleading. You could tell it wasn't taken by a drone, regardless of what method was used to create lift there would have been significant turbulence created by flying so close to the shelves, tables, etc.