TV/Panel Info description

Useful tool before buying tv.

Functions:
Calculate optimal watching distance from panel size, resolution, aspect ratio.
Calculate panel size from watching distance, resolution, aspect ratio.
Compare panels size (area, width, height, graphics)
Search tv model and show informations
Calibration Full-HD images (overscan, grayscale, brigthness, etc)

Any development idea, opinion is very welcome and appreciated. Thanks