They both have their pros and cons.
Its generally agreed upon that a black frame presents what's on the screen with the highest level of contrast, colors usually look sharper and tend to "pop" more. This is why u don't find too many white TVs. The black frame blends easily especially for movies with the aspect ratio.
That being said, a white frame can definitely be easier on the eyes (lower perceived contrast), u have less glare on the bezel even in indirect sunlight and can make browser and e-book reading easier as well. Lighter colors are accented eg. (so a scenic daylight beach can look stellar, IMO lol).
Very well put.