2) Is the iPad Mini (and iPad 2) really a low res display? I swore I watched 720p movies on my iPad 2. While they may have not been 720p exactly, I wouldn't have called it low res.
To be able to claim display of HD quality video, your display must be capable of 720p format without down-scaling. That is a 1280×720 resolution.
The iPad 2 (& iPad Mini) has a 1024x768 display, where the 720p content is downscaled and letter-boxed to 1024x576.
To compare, the Kindle Fire HD 7 has a 1280x800 display, so it qualifies as HD.