It's certainly nice to have, but — in my opinion — there aren't that many people who actually would use it. That's why you don't find that many tutorials about it.
If you model from a photograph (or a blueprint) (highly recommended, by the way), you usually get out of your way to find the right reference photos or create them yourself so you really have side, front, top and back views (or at least 2 to 3 of them), draw something, whatever, but most people seldom use just a normal photograph to create a model from that. And that has to be the right angle, like in the video above, where the whole thing wouldn't work if the angle was just a bit lower as the top texture wouldn't be usable anymore. Etc. I very seldom saw examples of it's use and myself have tried it just once, only to ditch the whole workflow and do it different (with better quality in the end, all this obviously in another app, but that's why I knew what you're talking about).
Cheetah can't compete with the functionality and the amount of tools in Blender (even other 3d apps can't anymore), as it's just a one man show. Martin, the developer has to concentrate on the real important stuff and easy to include things that then will be used by a majority of Cheetah users. Especially materials (no sss, no volumetrics, no bump and normal at the same time, a better displacement included in the material not somehow else) are way behind (at least it got a pbr workflow), quite a lot of work to do, if you think about it (Martin would be much further if Apple wouldn't have created one hindrance after the other, one of them ditching the whole openGL). And UV-Mapping in itself is at the moment quite good, but at the same time very basic. Straighten an UV-Island with just one click? No, so much has to be done by hand which is rather cumbersome, especially with a high poly mesh. And then there is the modeler to modernize, etc. So, no, I don't think that such a camera projection will find it's way into Cheetah any time soon.
All in all, all of today's dcc apps can't fullfill everybody's needs, not even Blender, which at the moment is the most versatile of them all. That's why plugin developers and specialized apps still thrive (like zbrush, substance, ryzom etc). So it's not that bad for a special use case to do it in another app for Cheetah users.