First of all, 16mm has about the same resolution as consumer HD cameras (HVX specifically). the HD cameras just stretch the pixels to make it 16:9 aspect ratio.
Another plus side to film is shooting tree skiing. There is nothing I hate more than filming in 6' of fresh snow and being stuck with a digital camera to baby so that it doesnt get wet. 16mm cameras are built like tanks. Plus film is much better at processing  flat light because you have different film speeds to work with, and higher contrast. With digi, you have one image that you can slightly tweak, but in the end, you will end up stretching the color data just to get a good exposure/contrast balence, and even then, the image will either be grainy or flat. A good example of this is to compare JP's tree skiing shots in Ski Porn (16mm) vs. the tree skiing in Yeah Dude (HVX).
Also, the HVX cams seem to shoot their moderate slow motion at a higher shutter than the 16mm cams. This is one of the things that makes it look so "real". It almost looks "too real" for some people to the point where it looks almost fake. In some instances though, I like it. Picture This is a perfect example of this; I think they did an amazing job using their HVXs.
Unless it's a bluebird day out, it's pretty damn easy to tell when something is shot digitally. Personally, I think it looks like shit, but that's only because I like the film look. And like it was stated earlier, it's all about preference. Film vs. digi is like blonde vs. brunette. Most people like this whole digi-craze right now so since I'm the minority here, I think it's a good idea for all these companies to shoot their HVX's.