Knight you miss the point
Says the guy who then proceeds to talk about aspect ratios rather than pixel density, which this article is about.
Nice. I think it's you that's quite missing the point (or lacking the technical expertise to differentiate the 2).
irritating bars
The bars aren't irritating at all. They tell me that I have more TV to show more content than just squished films where everything is done on an horizontal plane. Sometimes I like my 4:3 content, or my 16:9 content. And that's just video. For something more general like an iPad or a computer, the squarer the better. Web pages, documents, most of what we do in computing scrolls vertically, not horizontally.
Anyway, to answer your rant : That's what Airplay and the HDMI output are for.