Usually those ads are from the producers of the video and the next ad posted is going to be looking specifically for editors familiar with 5D, HVX, Red, etc.,.

Of course there are a number of one man bands and shops that shoot w/the same stable of camera but many (most?) editors aren't involved in the decision of which cameras are used and are just handed the shot footage. I guess my overall point is everyone is impacted by changes in technology and software even if not everyone argues about the minutia of it on the internet.
Besides Red, Alexas, SI-2K and Phantom (all low volume cameras) what other digital cameras shoot above 1080 (NHK's prototype cameras don't count

)? All of Panasonic's HD cameras, all of Canon's HD cameras, all of Sony's HD camera's, the Viper, the Genesis, etc., all top out at 1080. I wasn't meaning to imply that there are literally only 2 or 3 digital cameras in existence in the whole world that shoot beyond HD. Taking in the entire digital video landscape as a whole, though, recording beyond HD is a pretty rare thing.
One would assume they'd used the highest res available for the VFX plates but that still doesn't mean you need the highest res available for the offline edit. FCP's timelines are limited to 4000x4000 pixels and 4K is something like 4096x2304. Of course if are working w/Red footage you can just use a one of the smaller proxy's for the offline cut and then just switch to the full res 4K for VFX and finishing.
I haven't used Editshare's products personally but I've read very good things about them.