I'm always amused by this argument for not choosing a device that will be used for video. Excluding the iPad, Surface 3, and now the Nexus 9, most devices have a screen ration of 16:10 (tablets such as the Nexus 7, LG G Pad 8.4, Samsung Tab for a few examples) or 16:9 (nearly all smartphones). Do you realize that the vast majority of movies released now have an aspect ratio of 1.85 or 2.4? To avoid having black bars on the top and bottom of your tablet when playing video, it need to have an aspect ratio equal to or less than the display ratio (1.6 and 1.77, respectively, for the previous mentioned display ratios) or guess what, you'll have black bars. The only way to avoid these bars is to then zoom in, thus cutting off the left and right portions of the video.
Television is admittedly a different story as most of these shows are formatted for the native 16:9 display ratio of current televisions but again, unless your device also has a 16:9 ratio (and as mentioned, the vast majority of tablets don't), you're going to have black bars.
I personally will deal with some black bars if it means I see the entire picture, and get a whole bunch of extra screen real estate for other apps and web browsing.