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.
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.